ports/18554: Update: linux-netscape -> 4.73

[nemysis at FreeBSD.org]

Synopsis: Update: linux-netscape -> 4.73

Responsible-Changed-From-To: freebsd-ports->nemysis
Responsible-Changed-By: nemysis
Responsible-Changed-When: Fri Jan 10 17:28:55 UTC 2014
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=18554