Doxygen Updates - janitor work

Doxygen updates including mistakes, misspellings, missing parameters, updates for Doxygen style.  Some missing txt file links are removed but their content or essense will be included in some later updates.  A majority of the txt files were removed in the 1.6 era but never noted. The HR and EXTREF are simple changes that make the documentation more compatable with more versions of Doxygen.

Further updates coming.

(issue ASTERISK-20259)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@373330 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_skel.c

@@ -178,7 +178,7 @@ static void *skel_level_alloc(const char *cat);
  * internally by the Config Options code to check if an level has already been added to the
  * container that will be swapped for the live container on a successul reload.
  *
- * \param container A non-active container to search for a level
+ * \param tmp_container A non-active container to search for a level
  * \param category The category associated with the level to check for
  * \retval non-NULL The level from the container
  * \retval NULL The level does not exist in the container
@@ -648,6 +648,14 @@ static int unload_module(void)
 	return ast_unregister_application(app);
 }
 
+/*!
+ * \brief Load the module
+ *
+ * \par The configuration file
+ * 
+ * The application app_skel uses a configuration file.
+ * \verbinclude app_skel.conf.sample
+ */
 static int load_module(void)
 {
 	if (aco_info_init(&cfg_info)) {