databases/php-xapian: Mark BROKEN

Although php 8 support has been committed no release has been made yet.
An attempt has been made to extract RELEASE/1.4 tag and compile with
php80 but this was unsuccesful hence mark this BROKEN and extend the
EXPIRATION_DATE to 2023-03-31. Release 1.4.22 will have full php 8
support.

Approved by:	portmgr (blanket infrastructure)
Sponsored by:	Bounce Experts