To test the HTML email:
1. install the latest version of php-mail and php-mail-mime package, they are required
by the core sendmail function to send HTML email
2. set $wgAllowHTMLEmail = true before loading Echo in LocalSetting.php
Change-Id: Ia4b98b14e135742b84f1b0e04589b0efdd24e954
Adjusted the edit-user-talk event creation to detect and record which section
of the talk page was edited. Flyout, special page, and email messages have
been adjusted to use this section title as a URL fragment when available.
Bug: 46937
Change-Id: I161e2ffda2f2540f64de90cc621fb3b69479d0db
