Merge pull request #45 from drduh/wip-30jun24

Improved usernames and pepper handling

Merge pull request #43 from drduh/wip-23mar24

Trap exits, remove redundancies, add and document new config options

Merge pull request #40 from drduh/wip-10mar24

Version 3 beta

Backup script and gpg conf, release version 2

Version 2 beta, see release notes in README.

Set umask, update license and documentation