Merge branch 'hotfix/2.11.5'
Fixed some incorrect CHMOD settings (see #4573)
Optionally make `standardize()` preserve uppercase letters (see #4251)
Do not override the comments array in case login is required to comment, otherwise no commets will be shown (see #4064).
Update system/modules/frontend/Form.php

if ($doNotSubmit && !$this->Environment->isAjax) on line 218 should be I think 

if ($doNotSubmit && !$this->Environment->isAjaxRequest)
Do not add a default value to textareas (see #4722)
Merge pull request #4688 from tsarma/patch-3
Merge branch 'hotfix/2.11.6' of github.com:contao/core into hotfix/2.11.6
Wrap the MooTools fallback into CDATA tags on XHTML pages (see #4680)
Add a link if a news item or event points to an internal page (see #4671)
Correctly align stylect menus in the form generator in the back end (see #4557)
The mediabox plugin did not play Vimeo videos (see #4770)
Correctly handle units when importing style sheets (see #4721)
Correctly handle open tags in `String::substrHtml()` (see #4773)
Decode Punycode domains when used via insert tag (see #4753)
Set a bottom margin for the `tl_checkbox_container` because IE8 does not support `:last-child` (see #4017)
Also create empty templates folders if a theme is imported (see #4793)
URL encode the enclosure URLs in RSS/Atom feeds (see #4839)
Consider the page language when forwarding (see #4841)
Correctly handle root pages in `Controller::getPageDetails()` (see #4610)