This patch is a major refactor of the priority and facility parsing in
syslogd. The "new" facilities are taken from FreeBSD and are de facto
interpretations of facilities otherwise "reserved for system use", as
GLIBC syslog.h puts it.
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... and LOG_CRON_SOL, but only for completness.
Signed-off-by: Joachim Nilsson <troglobit@gmail.com>