ports/54913: update: mail/sylpheed-claws (0.8.10 -> 0.9.3)

[Trevor Johnson]

> Responsible-Changed-From-To: freebsd-ports-bugs->oliver
> Responsible-Changed-By: oliver
> Responsible-Changed-When: Sun Jul 27 07:03:19 PDT 2003
> Responsible-Changed-Why:
> Waiting for maintainers aproval
> I'll handle that

The maintainer, netchild, just updated the port to version 0.9.9, which
I'd assume is newer than the 0.9.3 version in this PR.
-- 
Trevor Johnson