Kamailio compatiblity: export parse_method function to modules.

The parser function was originally static and we are now exporting
it to other object files so that they can reuse the method parser.

parser/parse_methods.c

@@ -49,7 +49,7 @@ static int token_char(char _c)
   * Parse a method pointed by _next, assign its enum bit to _method, and update
   * _next past the method. Returns 1 if parse succeeded and 0 otherwise.
   */
-static int parse_method(str* _next, unsigned int* _method) 
+int parse_method(str* _next, unsigned int* _method) 
  {
 	 if (!_next || !_method) {
 		 LOG(L_ERR, "parse_method: Invalid parameter value\n");

parser/parse_methods.h

@@ -57,5 +57,7 @@ enum method {
  */
 int parse_methods(str* _body, unsigned int* _methods);
 
+int parse_method(str* _next, unsigned int* _method);
+
 
 #endif /* PARSE_METHODS_H */