fixed retrieveUser function in authad

previously it never returned any users

show PHP version only to admins and managers FS#2655

handle limit=0 correctly in authmysql/pgsql FS#2919

streamlined retrieveUsers() signature over all auth plugins FS#2919

Mediamanager: rename radio name attributes for sort and list buttons to
fix fs#2851
related to http://bugs.jqueryui.com/ticket/8761

included geshi styles per @import, removed from lib/exe/css

removed Yahoo sitemap ping, added Yandex instead FS#2880

Use DOKU_BASE in resolveinterwiki unittest

Fix double slash in coral interwikilink

LESSified GeSHI styles

combined geshi styles

using http://cleancss.com/

code reformatting

recompiled geshi styles FS#2902

move geshi highlighting to it's own LESS file

wikilink creating refactored to _resolveinterwiki().

Added DOKU_BASE for local target

FS#2388 give relative path to sendfile on nginx

use http_sendfile correct

enable/disable extensions via AJAX FS#2927

added tests for Doku_Renderer::_resolveInterWiki

Extend showuseras config with username_link

uses the user interwiki link as profile link

wikilink needs wiki target as well

handle interwiki without slashes as pageids. Added user interwiki

* allowed urlparams
* added `wiki:users:` as default user profile link

make media links in rss feeds absolute

This resolves issues with broken images when the wiki feed is
hosted by third parties (e.g. FeedBurner), as mentioned in
FS#2931 comments.

add missing '&' before 't' in url construction

Add Apache module list to ?do=debug information

This should make it possible to see if mod_security is involved,
at least on servers running mod_php.