core: allow anonymous access to the page_url_abs property.
(cherry picked from commit 6255d5e5b97559f58411b1793958428fbd36cd41)
core: added z:ld(modulename), z:restart(sitename) and z:flush(sitename)
(cherry picked from commit 3433892c30739754d1c7ee2d3e869f624bb17b95)
mod_export: added generic export controller and notifications. (docs will be added)
(cherry picked from commit 79841c16fe520312437e98463c93dca53d1ce470)