Closes many issues that I'll prune after adding more docs
for users.

Fixes #1581.

This was for the ssh server we removed.

Unset $PASSWORD after grabbing it

Closes #1583

Fixes #1549.

fix macOS spelling

Remove transformer file

Things got really out of whack when trying to update dependencies
earlier.

Also remove some unused imports that were causing build errors (they
were left over from the fix that allowed installing any extension kind).

This enables vscode-icons among others.

- Fix priority to match the commented behavior.
- Ignore bogus LOG_LEVEL values.

I managed to lose this deletion in a merge.

Deprecate --host and --port in favour of --bind-addr

Add basic rate limiting to login endpoint

Closes #1320

Remove SSH server

Pass the user data dir to the browser environment service then derive
all the paths we can based off that path like the global storage path
which the vim extension uses to store history (otherwise it gets stored
in the working directory from when code-server was spawned).

Arguably the better solution is to use the userdata scheme but that
won't work because the vim extension ignores the VS Code API.

Fixes #1551.

Closes #1502

Fix code-server.sh script on macOS

Closes #1465.

Closes #1530.

See #1532 for more context.

- Errored JSON requests will get back the error in JSON instead of using
  the status text. This seems better to me because it seems more correct
  to utilize the response body over hijacking the status text. The
  caller is expecting JSON anyway. Worst of all I never actually set the
  status text like I thought I did so it wasn't working to begin with.
- Allow the update error to propagate for JSON update requests. It was
  caught to show the error inline instead of an error page when using
  the update page but for JSON requests it meant there was no error and
  no error code so it looked like it succeeded.
- Make errors for failed requests to GitHub less incomprehensible.
  Previously they would just be the code which is no context at all.

Closes #1425

Fixes #1535.

Fixes #1507.

HTTP proxy

Otherwise the request will just hang.