www_stream: sh-friendly .onion URLs wrapping
The long v3 .onion URL was causing havoc on small mobile
displays, so extract "hostname" into a variable which can
still used as a Bourne shell snippet.
While we're at it, include "torsocks" in the git command used
for .onion URLs since that's the (near)-universal wrapper for
Tor-ifying things (like git) which are dynamically linked to
libc.
Cc: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Link: https://public-inbox.org/meta/20210816163654.c6gfzuezhji4l6s7@nitro.local/