Description: Lack of support of HTTP/2 by default starts to hurt,
for example with https-dns-proxy package, some DoH resolvers (like mullvad)
no longer support HTTP/1 and are not usable.
This enables HTTP/2 support by default (which would bring ~68Kb libnghttp).
Signed-off-by: Stan Grishin <stangri@melmac.net>