Author: David Mudrak
MDL-20438 initial support for checking available core update
In case of Moodle code itself, there is no plugin_manager like class
available so the checker class itself must be aware of versions and
actually do the checks. On the other hand, we can always rely that
version, release and maturity are always returned by the remote server.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=55585f3ac082f83fd36c3013ed67cad944b88652
http://github.com/moodle/moodle/commit/55585f3ac082f83fd36c3013ed67cad944b88652
+ 2.3 en [updateavailable,core_admin]
+ 2.3 en [updateavailable_moreinfo,core_admin]
+ 2.3 en [updateavailable_release,core_admin]
+ 2.3 en [updateavailable_version,core_admin]
+ 2.3 en [updateavailablenot,core_admin]