sysklogd: Update to 1.5.1

sysklogd: Update to 1.5.1

...and now to something completely different... ;-)

Changelog:

- Bugfix against invalid PRI values (CVE-2014-3634)

CVE-2014-3634:
"...sysklogd 1.5 and earlier allows remote attackers to cause a
denial of service (crash), possibly execute arbitrary code,
or have other unspecified impact via a crafted priority (PRI)
value that triggers an out-of-bounds array access."

Nothing good for a firewall...and besides, 'sysklogd' wasn't updated since 2010.

Best,
Matthias

Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>