The config.h-interface has proven to be very effective for a lot of
suckless tools, but it just does not make too much sense for a web
server like quark.
$ quark
If you run multiple instances of it, you want to see in the command line
(or top) what it does, and given the amount of options it's logical to
just express them as options given in the command line.
It also is a problem if you can modify quark via the config.h,
contradicting the manual. Just saying "Well, then don't touch config.h"
is also not good, as the vhost and map options were only exposed via
this interface.
What is left in config.h are mime-types and two constants relating to
the incoming HTTP-header-limits.
In order to introduce these changes, some structs and safe utility
functions were added and imported from OpenBSD respectively.
This makes quark's vhost-handling very powerful while still being
simple.
Imagine you have a website with a subdomain you really want
to move back to your main domain.
Say the subdomain is called "old.example.org" and you want to serve it
under "example.org" but in the subdirectory "old/", i.e. you want to
redirect a request "old.example.org/subdir/" to "example.org/old/subdir".
For a vhost-handler that only takes 4 arguments for each vhost this is
actually pretty powerful.
This ensures that quark really does not care if the incoming connection
is plain HTTP or relayed TLS-traffic from a proxy or tunnel. Depending
on the previous negotiation, the client will make the right decision on
which scheme to use in a given context.
And many other things, too many to list here. For example, it now
properly logs uds instead of erroring out.
Separating concerns in many places definitely improves the readability.
