Add default value. Deep clone config

lib/dialects/abstract/connection-manager.js

@@ -65,7 +65,7 @@ ConnectionManager.prototype.close = function () {
 // If he does this, generic-pool will try to call connect before the dialect-specific connection manager has been correctly set up
 // If he does this, generic-pool will try to call connect before the dialect-specific connection manager has been correctly set up
 ConnectionManager.prototype.initPools = function () {
 ConnectionManager.prototype.initPools = function () {
   var self = this
   var self = this
-    , config = this.config;
+    , config = _.cloneDeep(this.config);
 
 
   if (!config.replication) {
   if (!config.replication) {
     this.pool = Pooling.Pool({
     this.pool = Pooling.Pool({
@@ -92,12 +92,6 @@ ConnectionManager.prototype.initPools = function () {
     config.replication.read = [config.replication.read];
     config.replication.read = [config.replication.read];
   }
   }
 
 
-  // Make sure we don't modify the existing config object (user might re-use it)
-  config.replication.write = _.clone(config.replication.write);
-  config.replication.read = config.replication.read.map(function (read) {
-    return _.clone(read);
-  });
-
   // Map main connection config
   // Map main connection config
   config.replication.write = _.defaults(config.replication.write, {
   config.replication.write = _.defaults(config.replication.write, {
     host: config.host,
     host: config.host,

lib/sequelize.js

@@ -654,7 +654,7 @@ module.exports = (function() {
    * @param {Boolean}         [options.nest=false] If true, transforms objects with `.` separated property names into nested objects using [dottie.js](https://github.com/mickhansen/dottie.js). For example { 'user.username': 'john' } becomes { user: { username: 'john' }}. When `nest` is true, the query type is assumed to be `'SELECT'`, unless otherwise specified
    * @param {Boolean}         [options.nest=false] If true, transforms objects with `.` separated property names into nested objects using [dottie.js](https://github.com/mickhansen/dottie.js). For example { 'user.username': 'john' } becomes { user: { username: 'john' }}. When `nest` is true, the query type is assumed to be `'SELECT'`, unless otherwise specified
    * @param {Boolean}         [options.plain=false] Sets the query type to `SELECT` and return a single row
    * @param {Boolean}         [options.plain=false] Sets the query type to `SELECT` and return a single row
    * @param {Object|Array}    [options.replacements] Either an object of named parameter replacements in the format `:param` or an array of unnamed replacements to replace `?` in your SQL.
    * @param {Object|Array}    [options.replacements] Either an object of named parameter replacements in the format `:param` or an array of unnamed replacements to replace `?` in your SQL.
-   * @param {Boolean}         [options.forceWrite] Force the query to use the write pool, regardless of the query type.
+   * @param {Boolean}         [options.forceWrite=false] Force the query to use the write pool, regardless of the query type.
    *
    *
    * @return {Promise}
    * @return {Promise}
    *
    *