constify some xml functions

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4447 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/xml_int/mod_xml_curl/mod_xml_curl.c

@@ -56,11 +56,11 @@ static size_t file_callback(void *ptr, size_t size, size_t nmemb, void *data)
 }
 
 
-static switch_xml_t xml_url_fetch(char *section,
-								  char *tag_name,
-								  char *key_name,
-								  char *key_value,
-								  char *params,
+static switch_xml_t xml_url_fetch(const char *section,
+								  const char *tag_name,
+								  const char *key_name,
+								  const char *key_value,
+								  const char *params,
                                   void *user_data)
 {
 	char filename[512] = "";