func_curl: Don't hold exclusive lock when performing HTTP request.

This code originally kept a lock held when performing the HTTP
request to ensure that the options provided to curl remain valid.
This doesn't seem to be necessary these days and holding the lock
caused requests to happen sequentially instead of in parallel.

ASTERISK-18708 #close
Reported by: Dave Cabot
........

Merged revisions 432948 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/13@432949 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_curl.c

@@ -654,6 +654,7 @@ static int acf_curl_helper(struct ast_channel *chan, const char *cmd, char *info
 			curl_easy_setopt(*curl, cur->key, cur->value);
 		}
 	}
+	AST_LIST_UNLOCK(&global_curl_info);
 
 	if (chan && (store = ast_channel_datastore_find(chan, &curl_info, NULL))) {
 		list = store->data;
@@ -692,7 +693,6 @@ static int acf_curl_helper(struct ast_channel *chan, const char *cmd, char *info
 	if (store) {
 		AST_LIST_UNLOCK(list);
 	}
-	AST_LIST_UNLOCK(&global_curl_info);
 
 	if (args.postdata) {
 		curl_easy_setopt(*curl, CURLOPT_POST, 0);