Use `color.NoColor` as a global progressively modified as one descends
down command flags. Allows non-surprising operation when --color is
accepted at multiple layers, and even makes this behave predictably:
lotus-miner --color actor control list --color=false
Lotus API endpoint are by default expressed as multiaddresses (i.e. lotus auth
api-info) which end in /http, although they can be provided as standard URLs too.
There is an inconsistency here because despite the "http" part, Lotus will use "ws" protocol.
This lets lotus default to "ws" but honor whatever the user puts in the multiaddress (i.e.
/dns4/my.lotus.node/tcp/443/https) would work now using https, where before it uses "ws".
