ports/102505: Update port: graphics/optipng to 0.5.4

[Andrew Pantyukhin]

Synopsis: Update port: graphics/optipng to 0.5.4

State-Changed-From-To: feedback->closed
State-Changed-By: sat
State-Changed-When: Mon Aug 28 07:47:15 UTC 2006
State-Changed-Why: 
Sorry, I committed a similar update the same day, overlooking
this PR. Submit another one or follow-up to this one if I
should fix anything.

Thanks!

http://www.freebsd.org/cgi/query-pr.cgi?pr=102505