Is http2 supported on xenial now? It wasn't as of beta1 -- http2 was considered 'experimental' and wasn't included in the builds. We're using the PPA instead.
My understanding is that HTTP2 support in Apache was held out of Xenial but may be included later.[0] nginx in Xenial does have HTTP/2 support but no SPDY.
Xenial seems to include nginx 1.9.15 and OpenSSL 1.0.2, so it should fully support HTTP/2. Personally I would still use the official upstream nginx packages.
IIRC, xenial beta1 included nginx 1.9.12 with http2 explicitly disabled.