Corelight-client

* Fix issues with passing 2fa passcode through command line option -m

* Added 2FA support for the corelight appliance.

* Less pedantic messages indicating what user credentials are being stored and used.

* Improved informational messages indicating what user credentials are being stored and used.

* Fixed credential caching so that fleet bearer tokens are tied to a user.

* Added support for http connections over unix domain sockets through a new option:

--socket
Unix domain socket to use for sending requests.

* Improve handling & caching of credentials through new options:

--bearer
Specify bearer token or API key used for authentication

--noblock
Assume a non-interactive shell and do not prompt the user
for input (incl. skipping confirmation prompts for
destructive operations)")

--no-password-save
Do not prompt to save password.