Enhancement Request: Support for encrypted SSL private keys

[slavak]

redis-py has long supported using SSL client certificates by specifying the ssl_certfile and ssl_keyfile arguments. Unfortunately, there doesn't seem to be any way to make this work if the private key is password-encrypted. The underlying ssl module supports this natively (using the password argument to SSLContext.load_cert_chain), so supporting it should be a relatively simple matter of adding an optional ssl_password argument.

Thanks for taking the time to read this!

[slavak]

Sweet! Thank you!