bash/aliases: add some DHCP aliases
git: ignore OpenOffice lock files
ssh: hosts (fix hostname for uk-pf-utenio2)
makepkg: quote the session ID
makepkg: use `nice` instead of `ionice`

Lower the CPU priority, and let IO priority inherit from that.
makepkg: run with normal priority

It seems that the overall performance remains good.
makepkg: do not grab a systemd inhibitor

The GNOME one is enough. I might reconsider later though.
makepkg: bring back the -Wno-error
xinitrc: use a darker background

Now it's different from GNOME, but I don't see GNOME's default texture often anyway.