add_phase2_altsubject_match
Description:
Adds an allowed alternate subject name match for "phase 2".
Until at least one match is added, the altSubjectName of the "phase 2" remote authentication server is not verified.
Parameters:
| this | the Setting8021x | 
| phase2_altsubject_match | the "phase 2" altSubjectName to allow for this connection | 
Returns:
| true if the "phase 2" alternative subject name match was successfully added, false if it was already allowed. |