ports/51079: upgrade SN 4.5.2 to sourcenav 5.1.2

[Alexander Leidinger]

Synopsis: upgrade SN 4.5.2 to sourcenav 5.1.2

State-Changed-From-To: open->closed
State-Changed-By: netchild
State-Changed-When: Wed May 7 09:00:47 PDT 2003
State-Changed-Why: 
Port is updated to 5.1.3 (based upon this PR).

http://www.freebsd.org/cgi/query-pr.cgi?pr=51079