Author: Simey Lameze
MDL-49114 environment: add slasharguments warning message
http://git.moodle.org/gw?p=moodle.git;a=commit;h=e22f5c6d87dd3eb4fe7bb43c0118e1487c62ede9
http://github.com/moodle/moodle/commit/e22f5c6d87dd3eb4fe7bb43c0118e1487c62ede9
+ 2.8 en [slashargumentswarning,core_admin]