fix: revert usage of SIGHUP to SIGINT

Author: michaelfig

packages/agoric-cli/lib/start.js

@@ -97,7 +97,7 @@ export default async function startMain(progname, rawArgs, powers, opts) {
     const ps = pspawn(agSolo, ['start', '--role=two_client'], {
       cwd: agServer,
     });
-    process.on('SIGHUP', () => ps.cp.kill('SIGHUP'));
+    process.on('SIGINT', () => ps.cp.kill('SIGINT'));
     return ps;
   }
 

packages/agoric-cli/test/test-workflow.js

@@ -57,7 +57,7 @@ test('workflow', async t => {
           stdoutStr += chunk.toString();
           if (stdoutStr.match(/^swingset running$/m)) {
             successfulStart = true;
-            startP.cp.kill('SIGHUP');
+            startP.cp.kill('SIGINT');
           }
         });
       }