- ~/.pwgenrc for defaults
-- add env var support for defaults as well

- whitespace (specifically, ' ')

- "quick-format" options - json-safe/escaped, mysql-safe/escaped, etc.

- prettier printing for errors in main?

- "Human Readability"?

- Hash/Salted hash generator
-- https://passlib.readthedocs.io/en/stable/lib/passlib.hash.html#module-passlib.hash
-- https://github.com/hlandau/passlib ?
--- missing from the above:
--- https://github.com/tg123/go-htpasswd