Add Variant "+http2" to the apache2 port

[alphanull (alphanull)]

I need to run my local webserver with http2 enabled for developing and testing. However, there is currently no built in support for this package. So I am forced to manually recompile apache with a modified port file after each update, which is quite cumbersome!

But actually I think the changes won't be that complicated - I am no expert with portfiles, but something similar like this should do it:

variant http2 description {Enable HTTP/2 support} {
    depends_lib-append port:nghttp2
    configure.args-append --enable-http2
     configure.args-append --with-nghttp2=/opt/local/lib/libnghttp2.14.dylib \
}

[mf2k (Frank Schima)]

In the future, please add the port maintainer(s) to Cc (port info --maintainers apache2), if any.

[Schamschula (Marius Schamschula)]

In efa3881cce68a0637c61e31415f8c0e385ae72a6/macports-ports (master):

apache2: add http2 variant

Closes: #60675

[alphanull (alphanull)]

Just wanted to say: thank you for adding this so fast! At first it took while until the addition was reflected in the updated portfiles, but now all works as expected. Thumbs up!