Provide some sane defaults for architectures this port does not support.
(The problem is harmless, but makes the 'duds' file on pointyhat look
very strange).
While here, remove alpha remnants.
Approved by: maintainer
- Try different approach in supporting of multiple architectures with different
version numbering. Inspired by perforce port.
PR: ports/67520
Submitted by: Tim Bishop <tim@bishnet.net> (maintainer)