func_pjsip_endpoint: Add PJSIP_ENDPOINT function for querying endpoint details

This patch adds a new function, PJSIP_ENDPOINT, which lets the dialplan query,
for any endpoint, any property configured on an endpoint. This function is a
companion to the CHANNEL function, which can be used to extract the endpoint
name for a channel.

Review: https://reviewboard.asterisk.org/r/3035


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/12@403616 65c4cc65-6c06-0410-ace0-fbb531ad65f3

doc/appdocsxml.dtd

@@ -85,6 +85,9 @@
   <!ELEMENT bridge_snapshot (#PCDATA)>
   <!ATTLIST bridge_snapshot prefix CDATA "">
 
+  <!ELEMENT configOptionToEnum (configOption|xi:include)*>
+  <!ATTLIST configOptionToEnum prefix CDATA "">
+
   <!ELEMENT description (para|note|warning|variablelist|enumlist|info|xi:include)*>
 
   <!ELEMENT parameter (optionlist|enumlist|argument|para|note|warning|parameter|info|xi:include)*>
@@ -103,7 +106,7 @@
   <!ATTLIST option implies CDATA "">
   <!ATTLIST option hasparams CDATA "">
 
-  <!ELEMENT enumlist (enum+)>
+  <!ELEMENT enumlist (configOptionToEnum|enum+)>
   <!ELEMENT enum (para|note|warning|parameter|enumlist|info|xi:include)*>
   <!ATTLIST enum name CDATA "">
 

doc/appdocsxml.xslt

@@ -1,4 +1,4 @@
-<xsl:stylesheet version="1.0" 
+<xsl:stylesheet version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
     <xsl:output omit-xml-declaration="yes" indent="yes"/>
 
@@ -10,6 +10,19 @@
         </xsl:copy>
     </xsl:template>
 
+    <xsl:template match="configOptionToEnum">
+        <xsl:for-each select="configOption">
+            <xsl:element name="enum">
+                <xsl:attribute name="name">
+                    <xsl:value-of select="@name"/>
+                </xsl:attribute>
+                <xsl:element name="para">
+                    <xsl:value-of select="synopsis"/>
+                </xsl:element>
+            </xsl:element>
+        </xsl:for-each>
+    </xsl:template>
+
     <xsl:template match="channel_snapshot">
         <xsl:element name="parameter">
             <xsl:attribute name="name">