Clean up documentation

This patch cleans up documentation in func_channel for the following items:
* rtpsource
* secure_signaling
* secure_media

(closes issue ASTERISK-20969)
Reported by: snuffy
patches:
  func_chan-update.diff uploaded by snuffy (License 5024)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@394980 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_channel.c

@@ -221,16 +221,35 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 						<para>     <literal>audio</literal>             Get audio destination</para>
 						<para>     <literal>video</literal>             Get video destination</para>
 						<para>     <literal>text</literal>              Get text destination</para>
+						<para>   Defaults to <literal>audio</literal> if unspecified.</para>
+					</enum>
+					<enum name="rtpsource">
+						<para>R/O Get source RTP destination information.</para>
+						<para>   This option takes one additional argument:</para>
+						<para>    Argument 1:</para>
+						<para>     <literal>audio</literal>             Get audio destination</para>
+						<para>     <literal>video</literal>             Get video destination</para>
+						<para>     <literal>text</literal>              Get text destination</para>
+						<para>   Defaults to <literal>audio</literal> if unspecified.</para>
 					</enum>
 				</enumlist>
 				<para><emphasis>chan_iax2</emphasis> provides the following additional options:</para>
 				<enumlist>
+					<enum name="osptoken">
+						<para>R/O Get the peer's osptoken.</para>
+					</enum>
 					<enum name="peerip">
 						<para>R/O Get the peer's ip address.</para>
 					</enum>
 					<enum name="peername">
 						<para>R/O Get the peer's username.</para>
 					</enum>
+					<enum name="secure_signaling">
+						<para>R/O Get the if the IAX channel is secured.</para>
+					</enum>
+					<enum name="secure_media">
+						<para>R/O Get the if the IAX channel is secured.</para>
+					</enum>
 				</enumlist>
 				<para><emphasis>chan_dahdi</emphasis> provides the following additional options:</para>
 				<enumlist>