Author: Sam Hemelryk
MDL-25290 cache_static: Added default static cache store
http://git.moodle.org/gw?p=moodle.git;a=commit;h=5f2836e6ccd2d1c41f54cfd4daf9a1c2ed3fa0fd
http://github.com/moodle/moodle/commit/5f2836e6ccd2d1c41f54cfd4daf9a1c2ed3fa0fd
+ 2.4 en [pluginname,cache_static]