Author: Andrew Nicols
MDL-81031 core: Add routing
http://git.moodle.org/gw?p=moodle.git;a=commit;h=1b7d08465c0e151132155f569e700fcef39c1e37
http://github.com/moodle/moodle/commit/1b7d08465c0e151132155f569e700fcef39c1e37
+ 4.5 en [cachedef_routes,core_cache]
+ 4.5 en [itemnotfound,core_error]