* Implement GetArmoredWithCustomHeaders
ArmorWithTypeAndCustomHeaders can be reused by other PGP armoured
objects.
* Update linting, and lint accordingly
`godot` has been improved and `goerr113` has been added (and ignored
here).
* Add custom headers for keys
* Minor comment changes
Co-authored-by: Aron Wussler <aron@wussler.it>
* Reduce complexity of SignatureCollector.Accept
* Add stylecheck linter, and lint accordingly
* Rephrase some comments
* godot - Top level comments should end with a dot.
* nestif - Reduce nested complexity of code
* Review changes
Co-authored-by: Aron Wussler <aron@wussler.it>
* Update header version to 2.0.0
* Add space to cleartext message armouring
* Fix password encrypted binary files
* Clear key private params in helpers
* Do not unlock key if private key is nil
* Document changes
* Use defer for ClearPrivateKeyParams
