tidy-up: apply clang-format fixes

To lib, vtls/vauth, vtls/vquic, lib/vtls.

Also:
- unit3400: drop redundant `(void)arg`.
  Follow-up to e78b1b3ecc #21153
- fix comment typos.

Closes #21786

lib/cookie.c

@@ -1153,7 +1153,7 @@ static CURLcode cookie_load(struct Curl_easy *data, const char *file,
       curlx_fclose(handle);
   }
   data->state.cookie_engine = TRUE;
-  ci->running = TRUE;          /* now, we are running */
+  ci->running = TRUE; /* now, we are running */
 
   return result;
 }