* gmid.c (main): changed behaviour: daemon off by default (main): changed -c in -C (cert option) (main): changed -k in -K (key option, for consistency with -C) (main): added -c to load a configuration (main): certs, key and doc (-C -K and -d) doesn't have a default value anymore (handle_handshake): add vhosts support

This alter the current state machine by adding S_HANDSHAKE as the initial state. There, we ensure we did the handshake and we check SNI. ATM we simply continue in S_OPEN, but later we can add virtual host checks there, and skip to S_INITIALIZING with an error state if the client is accessing a wrong host.

not every system has a __dead attribute for functions. This fixes the build on FreeBSD.

and while there replace SAFE_SETENV with an inline function. LOG is more difficult to transform into an inline function, given the string concatenations it does. The other LOG* and FATAL macros are fine as they already are.

It's correct, while my hacked valid_multibyte_utf8 would allow things that aren't technically UTF8.

SIGHUP is sent when the tty is detached and by default kills the process. When we run in the background we don't care anymore about the tty, so it should be safe for us to ignore SIGHUP. (frankly, I expected daemon(3) to do stuff like this for us).