comms/flrig: fix and improve the port

[alven]

Summary

• Fix typo in MASTER_SITES
• Remove the NATIVE menu option as it just adds -march=native, which CPUTYPE already does and is treewide. And it's also not supported across all ARCH-es.

https://sourceforge.net/p/fldigi/fldigi/ci/master/tree/m4/opt.m4

Test Plan

For every {amd64, i386} × {14.3, 13.5}:

• Successful poudriere testport
• Successful run-testing

[alven]

Reported by Daniel Engberg (diizzy) by email [0], so added him to reviewers.

[0] https://lists.freebsd.org/archives/dev-commits-ports-all/2025-August/171244.html

[alven]

Bump PORTREVISION

[diizzy]

Not sure if https://www.w1hkj.org/files/flrig/ is all that useful as it seems to drop legacy versions

[db]

@diizzy A long time ago the w1hkj repo was more useful. We only use the most up to date versions anyway so losing the legacy didn't seem a bad idea at the time. He has changed that link from time to time so yes I would agree with you now.

[yuri]

Approved.

Thanks,
Yuri