zsh-completion: _systemd-nspawn - add more argument completion filenames will be completed for --image/-i/--bind/--bind-ro/--tmpfs network interfaces for --network-(interface|macvlan|ipvlan|bridge) users for --user/-u, yes & no for --register, x86 * x86-64 for --personality display a message of the expected argument for --machine/-M/--uuid --slice/-S/--port/-p/--selinux-*/-Z/-L/--setenv Allow completing commands(and their options) of the host system for COMMAND

zsh-completion: add missing completions for systemd-nspawn

completions: fix/augment zsh completions for systemd-nspawn, busctl, loginctl, hostnamectl, localectl, machinectl

zsh_completion: Fix single letter args Things like -n to specify the lines to show with systemctl and journalctl accepts syntax like: journalctl -n4 systemctl -n14 Previously, typing `-nXX <tab>` where XX is a number, zsh would try to complete an integer. Now it will see the XX and use the _journalctl_none completion. This is also how any of the single letter options that take arguments work as well.

zsh_completion: Split out zsh _systemd-nspawn Also fix the random lack of completion