Removed unnecessary info text if dob is deactivated
Adding pt-PT installation language
Updating si-LK installation lang file
[bug][34050] Change message type to 'error' when delete fail JControllerAdmin. Fixes #4042
[bug][33423] Fixing onContentPrepareForm for multilang sites. Fixes #3238
[bug][34044] xcache not working under J3.3.3. Fixes #4083
[bug][34055] Version button unavailable in some cases. Fixes #4030
[bug] Wrong filename detection of Content-Disposition with ending semicolon. Fixes #4025
[34057] html characters are escaped in check-out tooltip
adding ENT_QUOTES
Removed leftover comment

As of comment in https://github.com/joomla/joomla-cms/pull/3918#issuecomment-51753040
[bug][34058] Wrong css-class in user-registration tooltip. Fixes #4094
[bug][32568] JoomlaUpdate fails if remember me plugin is enabled. Fixes #3467
Merge pull request #4093 from infograf768/checkin

[#34057] html characters are escaped in check-out tooltip
Updating TinyMCE pt-PT.js lang file
Merge pull request #4043 from bembelimen/patch-6

Removed unnecessary info text if dob is deactivated
[#33828] Enable / Disable option to force logout functionality (Fix
#3734)
[fix][34023] Admin activation of users by email link not working if logged in to frontend. Fixes #3239. Fixes #4104

Update registration.php
[fix][33586] Correct installation data for module assets relation. Fixes #3424
[fix][32285] Support JSON response in Internet Explorer < 10. Fixes #3653

Internet Explorer older than 10 does not accept
Content-Type: application/json
and would start to download response.

Also header Content-Disposition
would force IE to download response.

It would only occur if you would try to upload file by ajax in IE < 10,
because IE 7 - 9 do not support uploading file with XHR.

To test it see a test module in Code Tracker:
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_id=8103&tracker_item_id=32285

Related PR which are already outdated and closed:
https://github.com/joomla/joomla-cms/pull/2013
https://github.com/joomla/joomla-cms/pull/2166

Update json.php

Removed trailing whitespace

Update json.php

By default set mime type application/json and change it to text/plain only in a specific situation