Author: David Mudrak
MDL-30404 Ability to manually purge string caches from the language packs import utility
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6dc2df50f918b8fd419a9f866ce2d63ebf390875
http://github.com/moodle/moodle/commit/6dc2df50f918b8fd419a9f866ce2d63ebf390875
+ 2.2 en [langimportdisabled,tool_langimport]
+ 2.2 en [missingcfglangotherroot,tool_langimport]
+ 2.2 en [purgestringcaches,tool_langimport]