Commit Briefs
add compat/*.o
got doesn't seem to match (say) compat/freezero.o with *.o
move vhost_should_log call to server.c
log.o is linked to some regress/ stuff. Calling from there a vhost_* function means that we should link the regress/stuff to server.o too (and that would pull in other stuff...). Moving the call is easier, and also probably better.
fix various compilation errors
Include gmid.h as first header in every file, as it then includes config.h (that defines _GNU_SOURCE for instance). Fix also a warning about unsigned vs signed const char pointers in openssl.
accept4 -> accept
accept4(2) isn't part of any standard (even though it'll be part in the future) and raises warnings on some linux distro. Moreover, we don't have thread that may fork at any time, so doing a mark_nonblock after isn't a big deal.
BUFSIZ is variable, we need *exactly* 1024
Using BUFSIZ in sbuf is not OK. It's variable, and in various places we assume that sbuf is 1024 (like handle_cgi_reply). We could patch those, but we aren't sure BUFSIZ is >= 1024! Let's keep the hardcoded number. (found by debugging on arch on amd64, where BUFSIZ is bigger)