kern/144517: Remove obsolete Network Communications from base release

Sun Mar 7 02:34:14 UTC 2010

Synopsis: Remove obsolete Network Communications  from base release

State-Changed-From-To: open->closed 
State-Changed-By: brucec
State-Changed-When: Sun Mar 7 02:32:06 UTC 2010
State-Changed-Why: 
The kernel SLIP and PPP drivers and associated utilities were removed from 
the base system in April 2009 in r190751.

http://www.freebsd.org/cgi/query-pr.cgi?pr=144517