www/nginx-devel: switch to pcre2
The pcre library 8.45 has been released Jun 22nd, 2021 and is not
officially supported anymore.
The pcre2 support in nginx was introduced in 1.21.5, it's been
released Dec 28th, 2021. There're few modules are still require
devel/pcre, but since devel/pcre and devel/pcre2 can be coexist
and those few modules are happy with that, let's switch to pcre2
by default.
Also, while I'm here update third-party lua module to its
recent version - 0.10.23.
Bump PORTREVISION.