Author: Kevin Percy
MDL-15594 url: Add setting to enable parameters for URL
http://git.moodle.org/gw?p=moodle.git;a=commit;h=a7cb6a8de6a1a8e1ff91fc27fa60a2ef91e2eec6
http://github.com/moodle/moodle/commit/a7cb6a8de6a1a8e1ff91fc27fa60a2ef91e2eec6
+ 4.4 en [allowvariables,mod_url]
+ 4.4 en [allowvariables_desc,mod_url]