Add named callgroups/pickupgroups

This patch adds named calledgroups/pickupgroups to Asterisk.  Named groups are
implemented in parallel to the existing numbered callgroup/pickupgroup
implementation.  However, unlike the existing implementation, which is limited
to a maximum of 64 defined groups, the number of defined groups allowed for
named callgroups/pickupgroups is effectively unlimited.

Named groups are configured with the keywords "namedcallgroup" and
"namedpickupgroup".  This corresponds to the numbered group definitions of
"callgroup" and "pickupgroup".  Note that as the implementation of named groups
coexists with the existing numbered implementation, a defined named group of
"4" does not equate to numbered group 4.

Support for the named groups has been added to the SIP, DAHDI, and mISDN channel
drivers.

Review: https://reviewboard.asterisk.org/r/2043

Uploaded by:
	Guenther Kelleter(license #6372)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@370831 65c4cc65-6c06-0410-ace0-fbb531ad65f3

configs/chan_dahdi.conf.sample

@@ -841,6 +841,15 @@ group=1
 ;
 callgroup=1
 pickupgroup=1
+;
+; Named ring groups (a.k.a. named call groups) and named pickup groups.
+; If a phone is ringing and it is a member of a group which is one of your
+; named pickup groups, then you can answer it by picking up and dialing *8#.
+; For simple offices, just make these both the same.
+; The number of named groups is not limited.
+;
+;namedcallgroup=engineering,sales,netgroup,protgroup
+;namedpickupgroup=sales
 
 ; Channel variable to be set for all calls from this channel
 ;setvar=CHANNEL=42

configs/misdn.conf.sample

@@ -390,6 +390,13 @@ nodialtone=no
 ;callgroup=1
 ;pickupgroup=1
 
+; Named pickup groups and named call groups
+;
+; give a name to groups and configure any number of groups
+;
+;namedcallgroup=engineering,sales,netgroup,protgroup
+;namedpickupgroup=sales
+
 ; Set the outgoing caller id to the value.
 ;callerid="name" <number>
 

configs/sip.conf.sample

@@ -1432,6 +1432,8 @@ srvlookup=yes                   ; Enable DNS SRV lookups on outbound calls
 ;
 ;callgroup=1,3-4                 ; We are in caller groups 1,3,4
 ;pickupgroup=1,3-5               ; We can do call pick-p for call group 1,3,4,5
+;namedcallgroup=engineering,sales,netgroup,protgroup ; We are in named call groups engineering,sales,netgroup,protgroup
+;namedpickupgroup=sales          ; We can do call pick-p for named call group sales
 ;defaultip=192.168.0.60          ; IP address to use if peer has not registered
 ;deny=0.0.0.0/0.0.0.0            ; ACL: Control access to this account based on IP address
 ;permit=192.168.0.60/255.255.255.0