Merge pull request #600 from JulienVdG/master

moved _configMutex upper as reconfigureAction uses it
fix #599
direct fetch of author admin object
insure no duplicate tags
don't load plugins if running setup
do not set options
remove improper use of setOptionDefault
optimize master user handling
remove improper use of setOptionDefault
Wrong plugin enable setting
Better display if E_STRICT is not set
Handle mis-configured session paths
Notify if problem with session path
remove extra slash

PHP session handling apparently post-pends a slash to the session path,
so we do not need to.
remove explicit version
Take default file/folder permissions from the zp-core folder
fix test on editable theme files
angle quote wring direction
fix #603
fix #605