Turn off HTMLPurifier's DisplayLinkURI option

For some reason it disables the original link:
http://htmlpurifier.org/live/configdoc/plain.html#AutoFormat.DisplayLinkURI
Version 0.11.0.
Clear stale semaphores periodically as a safeguard.
Import from CREST killmails.
Add "view type" page.
Add attribute page (db browser).
Add DB browser pages to the sitemap.
Add effect page.
Add group, category, market group DB browser pages.
Import localization directly from reverence. Also import traits.
Add a rudimentary type comparison page.
Override some highIsGood values for cosmetic purposes.
Compare: sort by attribute and highlight differences.
Add help page for DB browser.
Add RPN attributes to compare pages, improve help page.
Minor improvements in reverence_insert.
Search improvements.

* Search types and loadouts together.
* Auto-redirect if there is only one result.
* Add a search form in the main navigation bar.
Filter common dispatch rules by prefix.
Default characters for accounts.
Fix: unbork javascript for IGB.