[mod_auth] RFC7616 HTTP Digest username* userhash

RFC7616 HTTP Digest username* and userhash support (if configured)

userhash support must be configured to enable:
auth.require = ( "/" => ( "user

[mod_auth] RFC7616 HTTP Digest username* userhash

RFC7616 HTTP Digest username* and userhash support (if configured)

userhash support must be configured to enable:
auth.require = ( "/" => ( "userhash" => "enable", ... ) )
and one of
auth.backend = "htdigest" # mod_authn_file
or
auth.backend = "dbi" # mod_authn_dbi
and appropriate modification to add userhash into htdigest or db table
along with adding "sql-userhash" => "..." SQL query for mod_authn_dbi

Note: open issue with curl preventing userhash from working with curl:
https://github.com/curl/curl/pull/8066

show more ...

[mod_auth*] rename http_auth.* -> mod_auth_api.*

rename http_auth.[ch] -> mod_auth_api.[ch]