[sr-dev] Parsing requires and supported in modules

Hello, I have been working on some outbound related fixes (problems identified by Olle during SIPit). Some of these require me to parse the "Require:" header. There is already a parser for "Supported:" in "lib/kcore" and the parsing for "Require:" is almost identical. To this end I have abstracted a lot of the code from "parse_supported.[ch]" into new "options-tags.[ch]" files and have a much shorter "parse_supported.[ch]" and "parse_require.[ch]" that use the options-tags parser. Another advantage of this is that it will simplify the writing of proper parsers for other similar headers in HTTP (for example, the "Sec-WebSocket-Protocol:" header used during the WebSocket handshake. Now that I've done this I would like to move these parser files from "lib/kcore" into "parser". Is there any reason I shouldn't do this? The code can be found in the pd/outbound branch. Regards, Peter