Do not allow Cross Site Scripting attacks

If you add a entry like 
[field] = "<script>alert('XSS Attack');</script>" to a document, the Javascript is executed. This change should fix the issue.
Update mongodbadmin.php

changed description
Merge remote-tracking branch 'mschultheiss/patch-1'
Extended password hiding regex for single server instances
(cherry picked from commit 44dd79184a59ef6a36d7c0b0ca2696c96cee3990)
from branch beatyrm/topic-showingpassword