Please document HTTPS support in README

I wonder about the HTTPS support in hotel.

I was able to find a few answers, but I think it should be more clearly described in the README

• What are the limitations of hotel HTTPS support feature
  The certificate will not be trusted and will not be shown as valid
• Which browsers are supporting hotel's HTTPS feature?
  Only some. E.g. Chrome. But not Safari
• Do I need to import the Hotel SSL root certificate
  No, this is not needed and does not help. Comands like $ security add-trusted-cert -k login.keychain-db ~/.hotel/cert.pem are useless