Merge changes from team/group/appdocsxml

This commit introduces the first phase of an effort to manage documentation of the
interfaces in Asterisk in an XML format.  Currently, a new format is available for
applications and dialplan functions.  A good number of conversions to the new format
are also included.

For more information, see the following message to asterisk-dev:

http://lists.digium.com/pipermail/asterisk-dev/2008-October/034968.html


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@153365 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_config.c

@@ -36,6 +36,23 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/pbx.h"
 #include "asterisk/app.h"
 
+/*** DOCUMENTATION
+	<function name="AST_CONFIG" language="en_US">
+		<synopsis>
+			Retrieve a variable from a configuration file.
+		</synopsis>
+		<syntax>
+			<parameter name="config_file" required="true" />
+			<parameter name="category" required="true" />
+			<parameter name="variable_name" required="true" />
+		</syntax>
+		<description>
+			<para>This function reads a variable from an Asterisk configuration file.</para>
+		</description>
+	</function>
+
+***/
+
 struct config_item {
 	AST_RWLIST_ENTRY(config_item) entry;
 	struct ast_config *cfg;
@@ -160,11 +177,6 @@ static int config_function_read(struct ast_channel *chan, const char *cmd, char
 
 static struct ast_custom_function config_function = {
 	.name = "AST_CONFIG",
-	.syntax = "AST_CONFIG(config_file,category,variable_name)",
-	.synopsis = "Retrieve a variable from a configuration file",
-	.desc = 
-	"   This function reads a variable from an Asterisk configuration file.\n"
-	"",
 	.read = config_function_read,
 };