* (bug 25642) A exception is now thrown instead of a fatal error when using
$wgSMTP without PEAR mail package
* (bug 19633) When possible, Upscale small SVGs when creating thumbnails.
-* (bug 25725) Unwanted linebreaks in diffs.
* (bug 11013) Database driver detection needs rewriting for robustness
* (bug 13409) Installer prompts could use clarification--now has help boxes
* (bug 16902) Installer spews warnings when exec() and dl() are not available
* rebuildFileCache.php no longer creates inappropriate cache files for redirects
* (bug 18372) $wgFileExtensions will now override $wgFileBlacklist
* (bug 25512) Subcategory list should not include category prefix for members.
+* (bug 20244) Installer does not validate SQLite database directory for stable path
=== API changes in 1.17 ===
* (bug 22738) Allow filtering by action type on query=logevent.