SSL support in www-servers/pshs requires new APIs introduced in libevent-2.1. Please consider adding ~arch keywords to 2.1.4-r1. I think all major blockers have been fixed by now, and I didn't have any issues with the new version myself.
It's an alpha according to upstream...
Could we go for keywords + p.mask then? This will at least make it easier for people to unmask it without getting 9999.
You want to mask the live ebuild? How about unmasking the <9999 ebuilds instead?
Actually, 2.1.5 is a beta, so I should have restored keywords there already.