set them as global vars; rename foreground -> debug

so that ge can provide its own log_request without requiring a separate logger process.

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.

reuse it in ge too.

it's just not worth it to inflict this breaking change to the users.

fatal usually appends the error string. Add 'fatalx' that doesn't. Fix callers and move the prototypes to log.h