moved _configMutex upper as reconfigureAction uses it

see also 9921fddb0de4204ab96bf8f210140863ada91191
Merge pull request #600 from JulienVdG/master

moved _configMutex upper as reconfigureAction uses it
fix #599
direct fetch of author admin object
Merge remote-tracking branch 'origin/master' into 1.4.6

Conflicts:
	zp-core/zp-extensions/elFinder.php

	modified:   zp-core/functions-basic.php
	modified:   zp-core/zp-extensions/elFinder.php
	modified:   zp-core/zp-extensions/zenpage/zenpage-template-functions.php