net/dimes: Mark DEPRECATED

- The project vaporized in early 2005
- The WWW is vaporized
- The distfiles are no longer available
- Set EXPIRATION_DATE 2024-02-29

For more information:
https://web.archive.org/web/20050523235412/http://www.netdimes.org/

Approved by:	portmgr (blanket)