Fix key type typo

src/reverseproxy.js

@@ -300,12 +300,10 @@ async function getKey(certName) {
     assert.strictEqual(typeof certName, 'string');
 
     const key = await blobs.getString(`${blobs.CERT_PREFIX}-${certName}.key`);
-    if (key) {
-        debug(`ensureKey: reuse existing key for ${certName}`);
-        return key;
-    }
+    if (key) return key;
 
     debug(`ensureKey: generating new key for ${certName}`);
+    // secp384r1 is same as prime256v1. openssl ecparam -list_curves. we used to use secp384r1 but it doesn't seem to be accepted by few mail servers
     return await openssl.generateKey('secp256r1');
 };