Fixed linenumbers when using callback-based macros
A less intrusive version. #line does not work in cmods very well.
Disable some broken certificate code.
Remove NPN. ALPN will move forward as RFC.
Moved compat code to the end, to make the file easier to read.
Update deprecation documentatin.
Improved debug
Improved debug and bugfixed ALPN parsing.
SSL.Constants: Added some missing MD5 suites.

Note: These suites are in the range earlier reserved for private use.
SSL.handshake: Some fixes in the handling of client certs.
SSL.context: Remove remnants of ecdsa_mode().

The function was removed some time ago. Now remove stale links
to it from the documentation.
SSL.Constants: Changed argument order for fmt_constant().

The new order allows fmt_constant() to be used directly in eg map().

Also gets rid of fmt_curve().