docs/187417: [patch] Handbook: Add some missing <replaceable>-tags in advanced-networking section

[wblock at FreeBSD.org]

Synopsis: [patch] Handbook: Add some missing <replaceable>-tags in advanced-networking section

State-Changed-From-To: open->closed
State-Changed-By: wblock
State-Changed-When: Mon Mar 31 20:17:44 UTC 2014
State-Changed-Why: 
These and other missing <replaceable> tags have been restored.  Thanks!

http://www.freebsd.org/cgi/query-pr.cgi?pr=187417