bash-completion: list valid signal names this is a follow-up for commit 18540892d18addc4dcb81

Updates in bash autocompletions Hi, I did ./check-undocumented.sh -b (my script just submitted) and checked the results. Cheers.

bash-completion: fix completion of complete verbs When doing 'command verb<TAB>', the arguments for verb would be proposed, but it is too early. We should complete verb first. https://bugs.freedesktop.org/show_bug.cgi?id=74596

loginctl,shell-completions: fix listing of sessions/users/seats

shell-completion: busctl

bash-completion: use a better definition of __contains_word - scope the iterator var - use the correct, quoted, non-expansion prone positional parameter notation - prevent expansion on RHS of comparison - remove unneeded explicit returns. This really should be defined only once...

bash-completion: split completions and move to new location Split the large bash completion script into separate, smaller files each named after the binary it is used for and move the files to /usr/share/bash-completion/completions. This way the completions can be loaded on demand and we only install the completions for the tools we actually build. The old path /etc/bash_completion.d/ is deprecated and will disappear in the future.