textproc/rxp: Mark BROKEN, deprecate and set expiration date to 2024-12-31

ftp site is dead, outdated port and upstream is at 1.5.2

Reference:
https://www.inf.ed.ac.uk/research/isddarch/admin/package-view-200?view=1&id=200

PR: 282287
Approved by: portmgr (maintainer timeout, 2+ weeks)