Allow setting of DB_SCHEMA and DB_PREFIX. Closes #1649

.env.example

@@ -9,6 +9,7 @@ DB_DATABASE=cachet
 DB_USERNAME=homestead
 DB_PASSWORD=secret
 DB_PORT=null
+DB_PREFIX=null
 
 CACHE_DRIVER=file
 SESSION_DRIVER=file

config/database.php

@@ -58,7 +58,7 @@ return [
         'sqlite' => [
             'driver'   => 'sqlite',
             'database' => env('DB_HOST', storage_path().'/database.sqlite'),
-            'prefix'   => '',
+            'prefix'   => env('DB_PREFIX', null),
         ],
 
         'mysql' => [
@@ -70,7 +70,7 @@ return [
             'port'      => env('DB_PORT', '3306'),
             'charset'   => 'utf8',
             'collation' => 'utf8_unicode_ci',
-            'prefix'    => '',
+            'prefix'    => env('DB_PREFIX', null),
             'strict'    => false,
             'engine'    => null,
         ],
@@ -83,8 +83,8 @@ return [
             'password'  => env('DB_PASSWORD', null),
             'port'      => env('DB_PORT', '5432'),
             'charset'   => 'utf8',
-            'prefix'    => '',
-            'schema'    => 'public',
+            'prefix'    => env('DB_PREFIX', null),
+            'schema'    => env('DB_SCHEMA', 'public'),
         ],
 
         'sqlsrv' => [
@@ -94,7 +94,7 @@ return [
             'username'  => env('DB_USERNAME', null),
             'password'  => env('DB_PASSWORD', null),
             'port'      => env('DB_PORT', null),
-            'prefix'    => '',
+            'prefix'    => env('DB_PREFIX', null),
         ],
 
     ],