Allow Null = 0

Allow Value to be nullable, will autofill 0 if value is null or 0, to facilitate "unlimited" connections.

app/Models/Database.php

@@ -51,7 +51,7 @@ class Database extends Model
         'database_host_id' => 'required|exists:database_hosts,id',
         'database' => 'required|string|alpha_dash|between:3,100',
         'username' => 'string|alpha_dash|between:3,100',
-        'max_connections' => 'string',
+        'max_connections' => 'nullable',
         'remote' => 'required|string|regex:/^[0-9%.]{1,15}$/',
         'password' => 'string',
     ];