Merge pull request #2481 from duck-rh/mysql_unix_socket_support

add UNIX socket support for MySQL

.env.example

@@ -5,6 +5,7 @@ APP_KEY=
 
 DB_DRIVER=mysql
 DB_HOST=localhost
+DB_UNIX_SOCKET=null
 DB_DATABASE=cachet
 DB_USERNAME=homestead
 DB_PASSWORD=secret

config/database.php

@@ -62,17 +62,18 @@ return [
         ],
 
         'mysql' => [
-            'driver'    => 'mysql',
-            'host'      => env('DB_HOST', null),
-            'database'  => env('DB_DATABASE', null),
-            'username'  => env('DB_USERNAME', null),
-            'password'  => env('DB_PASSWORD', null),
-            'port'      => env('DB_PORT', '3306'),
-            'charset'   => 'utf8',
-            'collation' => 'utf8_unicode_ci',
-            'prefix'    => env('DB_PREFIX', null),
-            'strict'    => false,
-            'engine'    => null,
+            'driver'      => 'mysql',
+            'host'        => env('DB_HOST', null),
+            'unix_socket' => env('DB_UNIX_SOCKET', null),
+            'database'    => env('DB_DATABASE', null),
+            'username'    => env('DB_USERNAME', null),
+            'password'    => env('DB_PASSWORD', null),
+            'port'        => env('DB_PORT', '3306'),
+            'charset'     => 'utf8',
+            'collation'   => 'utf8_unicode_ci',
+            'prefix'      => env('DB_PREFIX', null),
+            'strict'      => false,
+            'engine'      => null,
         ],
 
         'pgsql' => [