[CLI] Add a node and rebalance documentation states that 'https://' is used by default

What's the issue?
The docs site for adding a node via the CLI states the following.

Note that the server to be added should be prefixed with an appropriate scheme (ie, http:// or https://): if none is specified, https:// is used as the default.

I don't believe this is the case, for uses to connect via HTTPS, they will need to supply 'https://'.

# If the netloc is empty then it means that there was no scheme added

# to the URI and we are parsing it as a path. In this case no scheme

# means HTTP so we can add that scheme to the hostname provided.

if parsed.netloc == "":

    parsed = urllib.parse.urlparse("http://" + values)

This code from the 'CBEnvAction' (used by the '--cluster' flag) appears to back this up.