Add HEAD build to rcssserver

Closes #28558.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
rcssserver: add comment
disco 0.5.1

Closes #28458.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
xstow 1.0.2
xstow: fails with clang
Improve HexChat formula

- Use newer release 2.9.6.1
- Fix building HEAD
hexchat: add 2.9.6.1 bottle.