Make Rust's Cargo trust our certificate

Now you can intercept Cargo! Rust in general doesn't work
yet in all cases, except where it observes some other config
but step by step we get a little closer.

Author: pimterry

src/interceptors/terminal/terminal-env-overrides.ts

@@ -47,6 +47,8 @@ export function getTerminalEnvVars(
         'PERL_LWP_SSL_CA_FILE': httpsConfig.certPath,
         // Trust cert for HTTPS requests from Git
         'GIT_SSL_CAINFO': httpsConfig.certPath,
+        // Trust cert in Rust's Cargo:
+        'CARGO_HTTP_CAINFO': httpsConfig.certPath,
 
         // Flag used by subprocesses to check they're running in an intercepted env
         'HTTP_TOOLKIT_ACTIVE': 'true',