Author: Mark Nelson
MDL-54103 enrol_lti: show frame embedding warning
http://git.moodle.org/gw?p=moodle.git;a=commit;h=27d9859972ae3626f381f258a33a9514c6e1c4de
http://github.com/moodle/moodle/commit/27d9859972ae3626f381f258a33a9514c6e1c4de
+ 3.1 en [allowframembedding,enrol_lti]
+ 3.1 en [framembeddingnotenabled,enrol_lti]
+ 3.1 en [opentool,enrol_lti]