Commit Briefs
add a configure script and some compat
tested on openbsd, alpine and void
remove README.md target
leftover from when README.md was generated by gmid.1
improve mime handling
we still have an hardcoded list, but this implements the API needed to modify the mappings.
reorganize: move bunch of functions to server.c
cgi.c wasn't really needed; it better to group all the server related functions together, cgi or not. Now gmid.c contains only startup and utility code.
split into two processes: listener and executor
this way, we can sandbox the listener with seccomp (todo) or capsicum (already done) and still have CGI scripts. When we want to exec, we tell the executor what to do, the executor executes the scripts and send the fd backt to the listener.