www/nginx-devel: update from 1.24.0 to 1.25.0

Enable HTTPv3 protocol by default.
Remove third-party clojure module due to a build issue.

The OpenSSL compatibility layer, which emulates BoringSSL
QUIC API for OpenSSL, is enabled by default, and 0-RTT is
not supported in this mode.

Alternativly, it's possible to build nginx with a third-party
library from ports tree, that provides QUIC support:
o) BoringSSL
o) LibreSSL
o) QuicTLS

<Changelog>

*) Feature: experimental HTTP/3 support.

</Changelog>