Stale WWW entries in your ports

Dear Maintainer

The following ports contain a stale reference to a project website or
other relevant resource in the WWW entry of the ports' Makefiles:

japanese/tex-ptex      	http://www.ascii.co.jp/pb/ptex/

Please replace the stale WWW entry with one that provides information
that users of the port or package might consider useful (e.g. a project
website, configuration examples, further reading).