2.0.0-beta4

no longer checks if a request should be upgraded, rather just upgrades everything - this seems to drastically improve non-streaming replies with large payloads.

now incorporates some (slightly hacky) permissions changes to the 9p fs which allows for better separation of ownership between the host and guest.

fixes a bug where some systems would error trying to generate an ssh key because they didn't like rsa being capitalized

actually appends the beta tag to the version because i hadn't been doing that and that's silly