Initial commit based on sudox v3.4 by Martin Vaeth
Remove unneeded helper scripts
Simplify quoting. Fix LC_COLLATE
Simplify quoting
Fix -u and document why it can fail. Improve error messages
Use push.sh. More compatible mkdir
Speed up -z/-n tests
Improve some :+ substitutions
zsh-completion: first arg is user
Fix handling of SHELL
Fix shebang