Substring Environment Variables Overwrite Others

[bwolfe]

Seems that env vars that are substrings of a subsequent env var are overwriting the later variable.

If I use this in my tests:
env_to_nginx("COOKIE_SECRET=secret", "COOKIE_SECRET_ALT=alt");
then the "COOKIE_SECRET_ALT" value is "secret" in the code.

If I reverse the order to:
env_to_nginx("COOKIE_SECRET_ALT=alt", "COOKIE_SECRET=secret");
then it works as expected in the code. (So I do have a workaround, this is a minor inconvenience that wasted a few hours of my day)

This also happens if I put them as "env" directives in a main_config override section of the test.

This does NOT happen outside of tests when running the app. The env vars can be in any order and still work.