Author: David Mudrak
MDL-29977 MNet does not allow to start a remote session when masquerading as another user
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0d7887f554af8093810d26b9a739b0c529b7ab45
http://github.com/moodle/moodle/commit/0d7887f554af8093810d26b9a739b0c529b7ab45
+ 2.0 en [notpermittedtojumpas,core_mnet]