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=408d3ca00035a8b24cc091ec93253e802e268c2d
http://github.com/moodle/moodle/commit/408d3ca00035a8b24cc091ec93253e802e268c2d
+ 1.9 en [notpermittedtojumpas,mnet]