#6 daemons give error instead of recovering on bad path

[Brad Rathbun]

radiusd-acct: Couldn't open
/var/log/radauth/radius.log for logging.

Rather than complain and core when the logging path
specified in conf.h
isn't present, it would be better to just create the
file (and path if needed).
An entry in the logfile noting this fact would be good,
too.