to bin2hex(random_bytes()) for more secure random strings. Renamed
parse_microformats helper function to parse_hentry, to reflect what
it's used for. Also added new helper function parse_happ, which is
now used by the authorisation endpoint to display the details of
the application requesting authorisation. Reader module now has
initial support for Microsub API. Code that consumes parsed
microformats now follows summary fallback algorithm when
unrecognised properties are found.