net/isc-dhcp41-server: please bump revision

[Andriy Gapon]

It looks like the revision has not been bumped after the fix for FreeBSD 10 in
isc-dhcpd.in.

I had already prepared the following email when I noticed that the installed rc
script and the one in the port were different.

Subject: net/isc-dhcp42-server: rc script is no freebsd-10 aware
Environment:
FreeBSD 10.0-CURRENT amd64
isc-dhcp41-server-4.1.e_2,2

Symptom:
/etc/rc: WARNING: dhcpd_devfs_enable disabled -- not available
/etc/rc: ERROR: unable to copy directory /dev to /var/db/dhcpd/dev

Cause:
if test `uname -r | cut -c 1` -le 6; then
...

-- 
Andriy Gapon