interwiki : prefixed configurls handled as wikilinks

show PHP version only to admins and managers FS#2655

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

removed Yahoo sitemap ping, added Yandex instead FS#2880

code reformatting

wikilink creating refactored to _resolveinterwiki().

Added DOKU_BASE for local target

FS#2388 give relative path to sendfile on nginx

use http_sendfile correct

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

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.

change default arg value of userinfo in null instead false

fixed some doc strings

make HTTPclient check for SSL support

HTTPClient: correctly abort a proxy connection

if a needed CONNECT tunnel fails

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renamed code button to monospace FS#2934 and many others

Let's stop confusing people with what this button does

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update $username as well, when read from _SERVER

wrap userlink building with event.

Implements an event which can modify the link below usernames, and the
displayed user name.

When no name supplied, the name of currently logged-in user is used.

Update tpl_getConf() signature to match plugin::getConf()

fixed html errors in video and audio rendering

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