- Allow underscore at the beginning of email user login names

- Add config to clear php handler in apps vhost.

install/tpl/apache_apps.vhost.master

@@ -11,6 +11,10 @@
   ServerAdmin webmaster@localhost
   {apps_vhost_servername}
   
+  <FilesMatch "\.ph(p3?|tml)$">
+    SetHandler None
+  </FilesMatch>
+  
   <IfModule mod_php5.c>
     DocumentRoot {apps_vhost_dir}
     AddType application/x-httpd-php .php

interface/web/mail/form/mail_user.tform.php

@@ -107,7 +107,7 @@ $form["tabs"]['mailuser'] = array (
 				0 => array (  'type'  => 'UNIQUE',
 					'errmsg'=> 'login_error_unique'),
 				1 => array (  'type'  => 'REGEX',
-					'regex' => '/^[a-z0-9][\w\.\-_\+@]{1,63}$/',
+					'regex' => '/^[_a-z0-9][\w\.\-_\+@]{1,63}$/',
 					'errmsg'=> 'login_error_regex'),
 			),
 			'default' => '',