Requires `net` since it downloads a waf tarball. It would be preferable
to use a packaged version of waf, unfortunately waf isn't packaged
currently, thus we enable `net` for now.

upstream has been dead for an eternity. We can't guarantee that this
software will continue to receive bug and security fixes.

This has been broken for a long time, no one noticed it. Thus I am
assuming that no one uses this. Additionally, other distribution built
mpv without rsound support as well and rsound upstream has been dead for
an eternity.

AST-2018-009 (CVE-2018-17281): Remote crash in HTTP websocket upgrade

the provides is setup correctly later on based on cross compile
variables

Stripping go binaries used to be an issue but nowadays it should work as
expected.

> We don't intentionally do anything that would make stripping a binary
> not OK, and strip has worked for the past five years or so.

https://groups.google.com/forum/?_escaped_fragment_=topic/golang-dev/ABppMOjYP6w#!topic/golang-dev/ABppMOjYP6w

This makes it possible to provide armv7 as additional architecture in
Alpine, next to armhf. See the discussion in this ML thread:
<https://lists.alpinelinux.org/alpine-devel/6271.html>

It's done by adding armv7 next to armhf in the arch line and also
!armv7 where the arch line said !armhf. The following script was used:

go-tools was removed in 11c5f257. It is
unclear to me why gogs depended on go-tools in the first place. The
build passes without go-tools so I guess it's fine to remove it.

Does not seem to be needed and hopefully it fixes a deadlock on aarch64

Changes from 1.10.4 include:

- Fixed an accidental null pointer free on systems where getaddrinfo() is unsuccessful