https://docs.inspircd.org/4/change-log/#inspircd-480
- The build system now allows using the system provided versions of
utf8cpp and http-parser which is great for us.
- Pass --disable-ownership which means we will no longer have to know
the user to which will run inspircd at build time (we didn't know that
before, so we had to pass --uid 0 and --gid 0 (which always exist),
but having .service files which hardcode User=root isn't great even
though the user could configure inspircd to use setuid(2)).
e960e6e1dc