Add SHA enhancement and reduce error output

Add SHA enhancement to generate more secure password hashes
Reduce error output if the optional configuration file is not available.

Interim minor changes, update dependencies

v0.4.0

Update copyright year

Add configuration watcher

v0.3.0

Update version 0.3

Permission prefix added

v0.2.0

Use version 0.2

Initial release

v0.1.0

Go Modules updates