Port missing features from release-7.3 branch

net/asterisk/files/iopsys/etc/asterisk/pjsip_registration

@@ -10,6 +10,9 @@ expiration = |DEFAULTEXPIRY|
 retry_interval = |REGISTERTIMEOUT|
 forbidden_retry_interval = 1
 max_retries = |REGISTERATTEMPTS|
+failover_max_retries = |FAILOVERREGISTERATTEMPTS|
+failover_retry_interval1 = |FAILOVERREGISTERINTERVAL1|
+failover_retry_interval2 = |FAILOVERREGISTERINTERVAL2|
 transport = transport-|TRANSPORT|
 mediasec = |MEDIASEC|
 contact_header_params = q=1