Make --ssl default true on pyremote
Make --ssl default true on pyremote

Summary:
This changes all pyremote clients to use TLS by default.

If you omit the `--ssl` argument, it'll default to true. You can also explictly set it with values `true` and `1`. Similarly, you can disable it with `false` and `0`.

Ideally, I would have used mutually exclusive argparse groups, but {emoji:1f937_200d_2642}

Reviewed By: knekritz

Differential Revision: D24875024

fbshipit-source-id: 85e81b7cbc3e9d4d75aca49d295e66c211b300e5

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