CHANGES: Add item for new 'pjsip show identif(y|ies) commands

Tested-by: George Joseph
........

Merged revisions 428836 from http://svn.asterisk.org/svn/asterisk/branches/12
........

Merged revisions 428837 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@428838 f38db490-d61c-443f-a65b-d21fe96a405b