Mosh appears to drop extra environment variables

[rrgeorge]

Checklist

• [x] Using latest version on the App Store (TestFlight 17.2.1.865)
• [x] Read the docs
• [x] Searched for existing GitHub issues

Configuration

Blink 17.2.1.865 iOS 17.2.1

Describe the bug

Sending a custom environment variable (via SendEnv) (such as LC_DEVICE) is lost when connecting over mosh. The variable is successfully set over SSH. Steps to reproduce:

1. Set SendEnv in .ssh/config (or host SSH config):

   SendEnv LC_DEVICE

2. Set env in host .blink/profile:

   LC_DEVICE=test

3. Confirm its set:

   blink> echo $LC_DEVICE
   test

4. Confirm its set over ssh:

   blink> ssh host
   $ echo $LC_DEVICE
   test

5. Try over mosh:

   blink> mosh host
   $ echo $LC_DEVICE

   no output

Expected behavior

For SendEnv variables to behave the same over mosh as they do on ssh