This patch adds support for Digest auth to quark. It follows RFC 7616, but with some limitations:
- SHA-256 is unsupported, only MD5 can be used. If we lived in an ideal world, SHA-256 Digest auth would be supported by browsers since mid-2010s. Turns out that we aren't that lucky, so MD5 it is.
- Only auth qop mode is supported. If you want to protect the integrity of your connection, better use a TLS tunnel.
- José Miguel Sánchez García <soy.jmi2k AT gmail DOT com>