[login] Trim inputs before inserting into users or examiners (#5809)

user_accounts and examiner modules trim whitespace around inputs before submission. request account does not do any trimming so entries like first/last name and emails get submitted with empty spaces around them.

Examiners with an incorrect Real_name value will cause a duplication of the examiner the first time the form is saved on user accounts because the name then gets trimmed and re-stored in it's correct format in the examiner table.

This results in a 500 error due to pselectRow returning more than one row.

modules/login/php/requestaccount.class.inc

@@ -143,9 +143,9 @@ class RequestAccount extends \NDB_Form
     function _process($values)
     {
         $DB       = \Database::singleton();
-        $name     = htmlspecialchars($_REQUEST["firstname"], ENT_QUOTES);
-        $lastname = htmlspecialchars($_REQUEST["lastname"], ENT_QUOTES);
-        $from     = htmlspecialchars($_REQUEST["from"], ENT_QUOTES);
+        $name     = trim(htmlspecialchars($_REQUEST["firstname"], ENT_QUOTES));
+        $lastname = trim(htmlspecialchars($_REQUEST["lastname"], ENT_QUOTES));
+        $from     = trim(htmlspecialchars($_REQUEST["from"], ENT_QUOTES));
         $site     = $_REQUEST["site"];
         $fullname = $name." ".$lastname;