www/nginx: Add PCRE2 Support
In NGINX version 1.21.5 (former devel version) PCRE2 support was added.
Please note: several modules are required patching to support PCRE2 library, so let's keep PCRE1 as default version for now.
While here, Update NJS to 0.7.4
Sponsored by: Netzkommune GmbH