Index: node_modules/nodemailer/lib/shared/index.js
===================================================================
--- node_modules/nodemailer/lib/shared/index.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
+++ node_modules/nodemailer/lib/shared/index.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
@@ -0,0 +1,688 @@
+/* eslint no-console: 0 */
+
+'use strict';
+
+const urllib = require('url');
+const util = require('util');
+const fs = require('fs');
+const nmfetch = require('../fetch');
+const dns = require('dns');
+const net = require('net');
+const os = require('os');
+
+const DNS_TTL = 5 * 60 * 1000;
+
+let networkInterfaces;
+try {
+    networkInterfaces = os.networkInterfaces();
+} catch (err) {
+    // fails on some systems
+}
+
+module.exports.networkInterfaces = networkInterfaces;
+
+const isFamilySupported = (family, allowInternal) => {
+    let networkInterfaces = module.exports.networkInterfaces;
+    if (!networkInterfaces) {
+        // hope for the best
+        return true;
+    }
+
+    const familySupported =
+        // crux that replaces Object.values(networkInterfaces) as Object.values is not supported in nodejs v6
+        Object.keys(networkInterfaces)
+            .map(key => networkInterfaces[key])
+            // crux that replaces .flat() as it is not supported in older Node versions (v10 and older)
+            .reduce((acc, val) => acc.concat(val), [])
+            .filter(i => !i.internal || allowInternal)
+            .filter(i => i.family === 'IPv' + family || i.family === family).length > 0;
+
+    return familySupported;
+};
+
+const resolver = (family, hostname, options, callback) => {
+    options = options || {};
+    const familySupported = isFamilySupported(family, options.allowInternalNetworkInterfaces);
+
+    if (!familySupported) {
+        return callback(null, []);
+    }
+
+    const resolver = dns.Resolver ? new dns.Resolver(options) : dns;
+    resolver['resolve' + family](hostname, (err, addresses) => {
+        if (err) {
+            switch (err.code) {
+                case dns.NODATA:
+                case dns.NOTFOUND:
+                case dns.NOTIMP:
+                case dns.SERVFAIL:
+                case dns.CONNREFUSED:
+                case dns.REFUSED:
+                case 'EAI_AGAIN':
+                    return callback(null, []);
+            }
+            return callback(err);
+        }
+        return callback(null, Array.isArray(addresses) ? addresses : [].concat(addresses || []));
+    });
+};
+
+const dnsCache = (module.exports.dnsCache = new Map());
+
+const formatDNSValue = (value, extra) => {
+    if (!value) {
+        return Object.assign({}, extra || {});
+    }
+
+    return Object.assign(
+        {
+            servername: value.servername,
+            host:
+                !value.addresses || !value.addresses.length
+                    ? null
+                    : value.addresses.length === 1
+                    ? value.addresses[0]
+                    : value.addresses[Math.floor(Math.random() * value.addresses.length)]
+        },
+        extra || {}
+    );
+};
+
+module.exports.resolveHostname = (options, callback) => {
+    options = options || {};
+
+    if (!options.host && options.servername) {
+        options.host = options.servername;
+    }
+
+    if (!options.host || net.isIP(options.host)) {
+        // nothing to do here
+        let value = {
+            addresses: [options.host],
+            servername: options.servername || false
+        };
+        return callback(
+            null,
+            formatDNSValue(value, {
+                cached: false
+            })
+        );
+    }
+
+    let cached;
+    if (dnsCache.has(options.host)) {
+        cached = dnsCache.get(options.host);
+
+        if (!cached.expires || cached.expires >= Date.now()) {
+            return callback(
+                null,
+                formatDNSValue(cached.value, {
+                    cached: true
+                })
+            );
+        }
+    }
+
+    resolver(4, options.host, options, (err, addresses) => {
+        if (err) {
+            if (cached) {
+                // ignore error, use expired value
+                return callback(
+                    null,
+                    formatDNSValue(cached.value, {
+                        cached: true,
+                        error: err
+                    })
+                );
+            }
+            return callback(err);
+        }
+
+        if (addresses && addresses.length) {
+            let value = {
+                addresses,
+                servername: options.servername || options.host
+            };
+
+            dnsCache.set(options.host, {
+                value,
+                expires: Date.now() + (options.dnsTtl || DNS_TTL)
+            });
+
+            return callback(
+                null,
+                formatDNSValue(value, {
+                    cached: false
+                })
+            );
+        }
+
+        resolver(6, options.host, options, (err, addresses) => {
+            if (err) {
+                if (cached) {
+                    // ignore error, use expired value
+                    return callback(
+                        null,
+                        formatDNSValue(cached.value, {
+                            cached: true,
+                            error: err
+                        })
+                    );
+                }
+                return callback(err);
+            }
+
+            if (addresses && addresses.length) {
+                let value = {
+                    addresses,
+                    servername: options.servername || options.host
+                };
+
+                dnsCache.set(options.host, {
+                    value,
+                    expires: Date.now() + (options.dnsTtl || DNS_TTL)
+                });
+
+                return callback(
+                    null,
+                    formatDNSValue(value, {
+                        cached: false
+                    })
+                );
+            }
+
+            try {
+                dns.lookup(options.host, { all: true }, (err, addresses) => {
+                    if (err) {
+                        if (cached) {
+                            // ignore error, use expired value
+                            return callback(
+                                null,
+                                formatDNSValue(cached.value, {
+                                    cached: true,
+                                    error: err
+                                })
+                            );
+                        }
+                        return callback(err);
+                    }
+
+                    let address = addresses
+                        ? addresses
+                              .filter(addr => isFamilySupported(addr.family))
+                              .map(addr => addr.address)
+                              .shift()
+                        : false;
+
+                    if (addresses && addresses.length && !address) {
+                        // there are addresses but none can be used
+                        console.warn(`Failed to resolve IPv${addresses[0].family} addresses with current network`);
+                    }
+
+                    if (!address && cached) {
+                        // nothing was found, fallback to cached value
+                        return callback(
+                            null,
+                            formatDNSValue(cached.value, {
+                                cached: true
+                            })
+                        );
+                    }
+
+                    let value = {
+                        addresses: address ? [address] : [options.host],
+                        servername: options.servername || options.host
+                    };
+
+                    dnsCache.set(options.host, {
+                        value,
+                        expires: Date.now() + (options.dnsTtl || DNS_TTL)
+                    });
+
+                    return callback(
+                        null,
+                        formatDNSValue(value, {
+                            cached: false
+                        })
+                    );
+                });
+            } catch (err) {
+                if (cached) {
+                    // ignore error, use expired value
+                    return callback(
+                        null,
+                        formatDNSValue(cached.value, {
+                            cached: true,
+                            error: err
+                        })
+                    );
+                }
+                return callback(err);
+            }
+        });
+    });
+};
+/**
+ * Parses connection url to a structured configuration object
+ *
+ * @param {String} str Connection url
+ * @return {Object} Configuration object
+ */
+module.exports.parseConnectionUrl = str => {
+    str = str || '';
+    let options = {};
+
+    [urllib.parse(str, true)].forEach(url => {
+        let auth;
+
+        switch (url.protocol) {
+            case 'smtp:':
+                options.secure = false;
+                break;
+            case 'smtps:':
+                options.secure = true;
+                break;
+            case 'direct:':
+                options.direct = true;
+                break;
+        }
+
+        if (!isNaN(url.port) && Number(url.port)) {
+            options.port = Number(url.port);
+        }
+
+        if (url.hostname) {
+            options.host = url.hostname;
+        }
+
+        if (url.auth) {
+            auth = url.auth.split(':');
+
+            if (!options.auth) {
+                options.auth = {};
+            }
+
+            options.auth.user = auth.shift();
+            options.auth.pass = auth.join(':');
+        }
+
+        Object.keys(url.query || {}).forEach(key => {
+            let obj = options;
+            let lKey = key;
+            let value = url.query[key];
+
+            if (!isNaN(value)) {
+                value = Number(value);
+            }
+
+            switch (value) {
+                case 'true':
+                    value = true;
+                    break;
+                case 'false':
+                    value = false;
+                    break;
+            }
+
+            // tls is nested object
+            if (key.indexOf('tls.') === 0) {
+                lKey = key.substr(4);
+                if (!options.tls) {
+                    options.tls = {};
+                }
+                obj = options.tls;
+            } else if (key.indexOf('.') >= 0) {
+                // ignore nested properties besides tls
+                return;
+            }
+
+            if (!(lKey in obj)) {
+                obj[lKey] = value;
+            }
+        });
+    });
+
+    return options;
+};
+
+module.exports._logFunc = (logger, level, defaults, data, message, ...args) => {
+    let entry = {};
+
+    Object.keys(defaults || {}).forEach(key => {
+        if (key !== 'level') {
+            entry[key] = defaults[key];
+        }
+    });
+
+    Object.keys(data || {}).forEach(key => {
+        if (key !== 'level') {
+            entry[key] = data[key];
+        }
+    });
+
+    logger[level](entry, message, ...args);
+};
+
+/**
+ * Returns a bunyan-compatible logger interface. Uses either provided logger or
+ * creates a default console logger
+ *
+ * @param {Object} [options] Options object that might include 'logger' value
+ * @return {Object} bunyan compatible logger
+ */
+module.exports.getLogger = (options, defaults) => {
+    options = options || {};
+
+    let response = {};
+    let levels = ['trace', 'debug', 'info', 'warn', 'error', 'fatal'];
+
+    if (!options.logger) {
+        // use vanity logger
+        levels.forEach(level => {
+            response[level] = () => false;
+        });
+        return response;
+    }
+
+    let logger = options.logger;
+
+    if (options.logger === true) {
+        // create console logger
+        logger = createDefaultLogger(levels);
+    }
+
+    levels.forEach(level => {
+        response[level] = (data, message, ...args) => {
+            module.exports._logFunc(logger, level, defaults, data, message, ...args);
+        };
+    });
+
+    return response;
+};
+
+/**
+ * Wrapper for creating a callback that either resolves or rejects a promise
+ * based on input
+ *
+ * @param {Function} resolve Function to run if callback is called
+ * @param {Function} reject Function to run if callback ends with an error
+ */
+module.exports.callbackPromise = (resolve, reject) =>
+    function () {
+        let args = Array.from(arguments);
+        let err = args.shift();
+        if (err) {
+            reject(err);
+        } else {
+            resolve(...args);
+        }
+    };
+
+module.exports.parseDataURI = uri => {
+    let input = uri;
+    let commaPos = input.indexOf(',');
+    if (!commaPos) {
+        return uri;
+    }
+
+    let data = input.substring(commaPos + 1);
+    let metaStr = input.substring('data:'.length, commaPos);
+
+    let encoding;
+
+    let metaEntries = metaStr.split(';');
+    let lastMetaEntry = metaEntries.length > 1 ? metaEntries[metaEntries.length - 1] : false;
+    if (lastMetaEntry && lastMetaEntry.indexOf('=') < 0) {
+        encoding = lastMetaEntry.toLowerCase();
+        metaEntries.pop();
+    }
+
+    let contentType = metaEntries.shift() || 'application/octet-stream';
+    let params = {};
+    for (let entry of metaEntries) {
+        let sep = entry.indexOf('=');
+        if (sep >= 0) {
+            let key = entry.substring(0, sep);
+            let value = entry.substring(sep + 1);
+            params[key] = value;
+        }
+    }
+
+    switch (encoding) {
+        case 'base64':
+            data = Buffer.from(data, 'base64');
+            break;
+        case 'utf8':
+            data = Buffer.from(data);
+            break;
+        default:
+            try {
+                data = Buffer.from(decodeURIComponent(data));
+            } catch (err) {
+                data = Buffer.from(data);
+            }
+            data = Buffer.from(data);
+    }
+
+    return { data, encoding, contentType, params };
+};
+
+/**
+ * Resolves a String or a Buffer value for content value. Useful if the value
+ * is a Stream or a file or an URL. If the value is a Stream, overwrites
+ * the stream object with the resolved value (you can't stream a value twice).
+ *
+ * This is useful when you want to create a plugin that needs a content value,
+ * for example the `html` or `text` value as a String or a Buffer but not as
+ * a file path or an URL.
+ *
+ * @param {Object} data An object or an Array you want to resolve an element for
+ * @param {String|Number} key Property name or an Array index
+ * @param {Function} callback Callback function with (err, value)
+ */
+module.exports.resolveContent = (data, key, callback) => {
+    let promise;
+
+    if (!callback) {
+        promise = new Promise((resolve, reject) => {
+            callback = module.exports.callbackPromise(resolve, reject);
+        });
+    }
+
+    let content = (data && data[key] && data[key].content) || data[key];
+    let contentStream;
+    let encoding = ((typeof data[key] === 'object' && data[key].encoding) || 'utf8')
+        .toString()
+        .toLowerCase()
+        .replace(/[-_\s]/g, '');
+
+    if (!content) {
+        return callback(null, content);
+    }
+
+    if (typeof content === 'object') {
+        if (typeof content.pipe === 'function') {
+            return resolveStream(content, (err, value) => {
+                if (err) {
+                    return callback(err);
+                }
+                // we can't stream twice the same content, so we need
+                // to replace the stream object with the streaming result
+                if (data[key].content) {
+                    data[key].content = value;
+                } else {
+                    data[key] = value;
+                }
+                callback(null, value);
+            });
+        } else if (/^https?:\/\//i.test(content.path || content.href)) {
+            contentStream = nmfetch(content.path || content.href);
+            return resolveStream(contentStream, callback);
+        } else if (/^data:/i.test(content.path || content.href)) {
+            let parsedDataUri = module.exports.parseDataURI(content.path || content.href);
+
+            if (!parsedDataUri || !parsedDataUri.data) {
+                return callback(null, Buffer.from(0));
+            }
+            return callback(null, parsedDataUri.data);
+        } else if (content.path) {
+            return resolveStream(fs.createReadStream(content.path), callback);
+        }
+    }
+
+    if (typeof data[key].content === 'string' && !['utf8', 'usascii', 'ascii'].includes(encoding)) {
+        content = Buffer.from(data[key].content, encoding);
+    }
+
+    // default action, return as is
+    setImmediate(() => callback(null, content));
+
+    return promise;
+};
+
+/**
+ * Copies properties from source objects to target objects
+ */
+module.exports.assign = function (/* target, ... sources */) {
+    let args = Array.from(arguments);
+    let target = args.shift() || {};
+
+    args.forEach(source => {
+        Object.keys(source || {}).forEach(key => {
+            if (['tls', 'auth'].includes(key) && source[key] && typeof source[key] === 'object') {
+                // tls and auth are special keys that need to be enumerated separately
+                // other objects are passed as is
+                if (!target[key]) {
+                    // ensure that target has this key
+                    target[key] = {};
+                }
+                Object.keys(source[key]).forEach(subKey => {
+                    target[key][subKey] = source[key][subKey];
+                });
+            } else {
+                target[key] = source[key];
+            }
+        });
+    });
+    return target;
+};
+
+module.exports.encodeXText = str => {
+    // ! 0x21
+    // + 0x2B
+    // = 0x3D
+    // ~ 0x7E
+    if (!/[^\x21-\x2A\x2C-\x3C\x3E-\x7E]/.test(str)) {
+        return str;
+    }
+    let buf = Buffer.from(str);
+    let result = '';
+    for (let i = 0, len = buf.length; i < len; i++) {
+        let c = buf[i];
+        if (c < 0x21 || c > 0x7e || c === 0x2b || c === 0x3d) {
+            result += '+' + (c < 0x10 ? '0' : '') + c.toString(16).toUpperCase();
+        } else {
+            result += String.fromCharCode(c);
+        }
+    }
+    return result;
+};
+
+/**
+ * Streams a stream value into a Buffer
+ *
+ * @param {Object} stream Readable stream
+ * @param {Function} callback Callback function with (err, value)
+ */
+function resolveStream(stream, callback) {
+    let responded = false;
+    let chunks = [];
+    let chunklen = 0;
+
+    stream.on('error', err => {
+        if (responded) {
+            return;
+        }
+
+        responded = true;
+        callback(err);
+    });
+
+    stream.on('readable', () => {
+        let chunk;
+        while ((chunk = stream.read()) !== null) {
+            chunks.push(chunk);
+            chunklen += chunk.length;
+        }
+    });
+
+    stream.on('end', () => {
+        if (responded) {
+            return;
+        }
+        responded = true;
+
+        let value;
+
+        try {
+            value = Buffer.concat(chunks, chunklen);
+        } catch (E) {
+            return callback(E);
+        }
+        callback(null, value);
+    });
+}
+
+/**
+ * Generates a bunyan-like logger that prints to console
+ *
+ * @returns {Object} Bunyan logger instance
+ */
+function createDefaultLogger(levels) {
+    let levelMaxLen = 0;
+    let levelNames = new Map();
+    levels.forEach(level => {
+        if (level.length > levelMaxLen) {
+            levelMaxLen = level.length;
+        }
+    });
+
+    levels.forEach(level => {
+        let levelName = level.toUpperCase();
+        if (levelName.length < levelMaxLen) {
+            levelName += ' '.repeat(levelMaxLen - levelName.length);
+        }
+        levelNames.set(level, levelName);
+    });
+
+    let print = (level, entry, message, ...args) => {
+        let prefix = '';
+        if (entry) {
+            if (entry.tnx === 'server') {
+                prefix = 'S: ';
+            } else if (entry.tnx === 'client') {
+                prefix = 'C: ';
+            }
+
+            if (entry.sid) {
+                prefix = '[' + entry.sid + '] ' + prefix;
+            }
+
+            if (entry.cid) {
+                prefix = '[#' + entry.cid + '] ' + prefix;
+            }
+        }
+
+        message = util.format(message, ...args);
+        message.split(/\r?\n/).forEach(line => {
+            console.log('[%s] %s %s', new Date().toISOString().substr(0, 19).replace(/T/, ' '), levelNames.get(level), prefix + line);
+        });
+    };
+
+    let logger = {};
+    levels.forEach(level => {
+        logger[level] = print.bind(null, level);
+    });
+
+    return logger;
+}