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=10df8657c1c138c0d0ab1d4796c552fcec0c299b
http://github.com/moodle/moodle/commit/10df8657c1c138c0d0ab1d4796c552fcec0c299b
+ 2.2 en [notpermittedtojumpas,core_mnet]