there's no more any `static' target

add a `lint' maintainer target to check the manpages

use REGRESS_HOST to specify the host to listen to; use in CI some CI envs don't like `listen on localhost' but tolerate INADDR_ANY or IN6ADDR_ANY_INIT.

add missing -include of *.d files

add `release' target

rework the configure script now it resembles less oconfigure and more the configure scripts I'm using in my recent projects. I'd argue it's more easy to use it.

add a privsep crypto engine Incorporate the OpenSMTPD' privsep crypto engine. The idea behind it is to never load the certificate' private keys in a networked process, instead they are loaded in a separate process (the `crypto' one) which signs payloads on the behalf of the server processes. This way, we greatly reduce the risk of leaking the certificate' private key should the server process be compromised. This currently compiles only on LibreSSL (portable fix is in the way).

move logger() prototype to gmid.h and delete logger.h

make ge work again

sync DISTFILES

use -MMD if the compiler supports it it's better than the previous Makefile.depend approach since this automatically adapts to the included headers without requiring manual intervention to regen the list.

remove Makefile.depend

reformat

rework the daemon to do fork+exec It uses the 'common' proc.c from various OpenBSD-daemons. gmid grew organically bit by bit and it was also the first place where I tried to implement privsep. It wasn't done very well, in fact the parent process (that retains root privileges) just fork()s a generation of servers, all sharing *exactly* the same address space. No good! Now, we fork() and re-exec() ourselves, so that each process has a fresh address space. Some features (require client ca for example) are temporarly disabled, will be fixed in subsequent commits. The "ge" program is also temporarly disabled as it needs tweaks to do privsep too.

switch to the more usual log.c