When booting a system with WITHOUT_IPFILTER the following errors
are encountered at boot time:

rcorder: requirement ipfs' in file /etc/rc.d/netif' has no providers.
rcorder: requirement ipfilter' in file /etc/rc.d/netif' has no
providers.
rcorder: requirement ipfilter' in file /etc/rc.d/netwait' has no
providers.
rcorder: requirement ipfilter' in file /etc/rc.d/net_watchdog' has no
providers.
rcorder: requirement ipfilter' in file /etc/rc.d/securelevel' has no
providers.

Listing its own requrements in BEFORE rather than use REQUIRE of
non-optional scripts resolves this issue.

The issue was discovered and patched by glebius at Netflix.

Submitted by: glebius
Reported by: glebius
MFC after: 1 week