Indicate watcher vs. inquistor logging

Also:
- ensure shutdown can happen (systemd wants the full path to kill)
- pacemaker doesn't use per-user core directories anymore
Fix startup when no disks are in use
Let systemd own where the pidfile lives
Correctly handle when pacemaker goes bad when there are no disk servants
Fix the parsing of devices from the environment
Ensure the correct version of setproctitle is built
Prevent watchdogdev variable from being erased on fork()
Only assume a healthy pacemaker if no disks are in use