LOGIN: fix typo in description

Correct the "direction" of the barrier dependencies (DAEMON, LOGIN,
NETWORKING, and SERVERS) by specifying that certain things should
come BEFORE a given barrier, rather than having the barrier REQUI

Correct the "direction" of the barrier dependencies (DAEMON, LOGIN,
NETWORKING, and SERVERS) by specifying that certain things should
come BEFORE a given barrier, rather than having the barrier REQUIRE
a service. This allows scripts to be removed without having to
edit the barrier dependencies.

As discussed on tech-userlevel, and approved by Luke.

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s/dependancy/dependency/. explicitly require DAEMON

Remove references to gated, except the conflict check in rc.d/routed.
Noted by Launey Thomas <ljt@alum.mit.edu>.

sort REQUIRE lines

reword description

s/xntpd/ntpd/

* replace daemon, login, servers with DAEMON, LOGIN, SERVERS
* remove sshd (it was from my private system)