Add documentation to the ability to retrieve the source port of a SIP call.

(belongs with r419970)

ASTERISK-24040 #close
Patches:
	func_channel.c.diff uploaded by dtryba

Review: https://reviewboard.asterisk.org/r/3781/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@420144 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_channel.c

@@ -213,6 +213,9 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 					<enum name="recvip">
 						<para>R/O Get the source IP address of the peer.</para>
 					</enum>
+					<enum name="recvport">
+						<para>R/O Get the source port of the peer.</para>
+					</enum>
 					<enum name="from">
 						<para>R/O Get the URI from the From: header.</para>
 					</enum>