Auto-anchor attribute regexes, document _validTags
FIX: Use lang- prefixes for HLJS; add nohighlight for ...

text; use a proper whiteListTag() call.

Old posts are not affected - no global rebake is necessary.
Clean up validateAttribute() function

Remove code duplication
FEATURE: Allow explicit rel="nofollow" on links
Fix JSHint
Fix data-* behavior (failure to understand own docs)
Update Markdown tests
Add emoji pl_PL localization
Remove href attribute from tab link to prevent duplicate event on enter.

Because Discourse doesn't preventDefault on links with an href of "#"
this tab-able link was firing a click event when enter was pressed. This
had the unfortunate side effect of breaking the history, making routing
and navigation unreliable.
Add additional fields that indicate reply

When scanning for where a reply starts, three lines in a row matching common email reply headers indicate the start of a reply. Add 'Cc', 'Bcc', and 'Date' because these are also common.
make sure categories don't wrap in email digests
Merge pull request #2906 from techAPJ/patch-3

Moderators can search users by ip address
include all groups in user csv export
Merge pull request #2907 from techAPJ/patch-1

include all groups in user csv export
Show dismiss posts/topics buttons on category filtered lists
FEATURE: allow long polling to go to a different url

Added the site setting long_polling_base_url , this allows you
to farm long polling to a different server.

This setting is very important if a CDN is serving dynamic content.
Improved release notes.

- Format markdown with headers and bullets.
- Split out comments with more than one FIX or FEATURE
- Escape a few characters that disrupt formatting
FIX: missing headers from long poll response
emails from microsoft outlook 14 were not getting parsed as text
FIX: Make shortcut 'c' global for creating a topic

https://meta.discourse.org/t/keyboard-shortcut-c-create-a-new-topic-does-not-work-globally/18975