Openlitespeed cannot work because there is no php that supports litespeed.
We are requesting additional support using the ticket below.
dev-lang/php: add litespeed support. See also https://bugs.gentoo.org/908876
app-eselect/eselect-php: add openlitespeed. See also https://bugs.gentoo.org/908996
Signed-off-by: Okamura Kazuya <gentoo-guru@danceylove.net>