Add support for embedded Tor v0.4.7.x

[mibmo]

Passes tests and seems to work just fine, but it'd be nice if someone would independently verify.
It's essentially just a copy of the Tor v0.3.5.x implementation, but search-and-replaced.

For tests in cretz/tor-static#36 and MacOS support in cretz/tor-static#35.

[cretz]

This looks great, thanks! I assume the embeddedtest succeeds when statically compiled w/ your upcoming updates in tor-static?

[mibmo]

Yep! :)

I haven't tested all of Bine's functionality, but when building tor-static it worked just fine using "normally" (I tested HS & proxy)

[cretz]

Fantastic! Feel free to squash and merge whenever. Once the tor-static is merged and we know it's all working, we may want to change process/embedded/process.go to default to this version in a subsequent PR.

[mibmo]

Fantastic! Feel free to squash and merge whenever. Once the tor-static is merged and we know it's all working, we may want to change process/embedded/process.go to default to this version in a subsequent PR.

I don't have the permissions to do that, could you? but otherwise, sounds great! :)

[cretz]

Done, thanks!