- Add functionality to edit a file specified on the command line.
- Add `-n` option for running prerequisite checks without editing the
configuration file.
- Install vidoas in `@PREFIX@/sbin` as it is really more of a system
maintenance command (run by administrators; requires root privileges
for editing the default **doas(1)** configuation file).
- Add a manual page (in section `8`).
- Release the code under the same MIT-like license as **doas(1)**
itself.
