docs/95408: install over serial console does not work as documented

[remko at FreeBSD.org]

Synopsis: install over serial console does not work as documented

Responsible-Changed-From-To: remko->freebsd-doc
Responsible-Changed-By: remko
Responsible-Changed-When: Thu Sep 27 07:44:21 UTC 2012
Responsible-Changed-Why: 
I have held this locked for too long, reassign to the pool

http://www.freebsd.org/cgi/query-pr.cgi?pr=95408