audio/rplay: Deprecate and set expiration date to 2021-12-31

[diizzy]

Summary

Abandoned upstream, no new releases since 1999
Reported broken on amd64 in 2012, PR: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=166658

PR: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258647

[diizzy]

I'll rephrase the commit message, this was never confirmed to be working by submitter and it's also considered dead/abandoned in general
http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/audio/rplay/Attic/Makefile
Are those arguments reasonable?

[tcberner]

In D32044#725481, @diizzy wrote:

I'll rephrase the commit message, this was never confirmed to be working by submitter and it's also considered dead/abandoned in general
http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/audio/rplay/Attic/Makefile
Are those arguments reasonable?

yes, sounds fine