tidy-up: docs, comments, typos, whitespace

- GHA/windows: mention `IgnoreStandardErrorWarningFormat=true`
  in comment.
- cmake: fix MIT/GNU GSS order in messages.
- drop some exclamation marks from messages.
- drop redundant ending newlines from messages.
- fold/unfold where possible.
- fix indent, whitespace, typos and other nits.

Closes #22185

tests/server/dnsd.c

@@ -722,7 +722,7 @@ static void read_instructions(void)
           rc = buf[0] ? 0 : 1;
         }
         if(rc != 1) {
-          logmsg("Bad line in %s: '%s'\n", file, buf);
+          logmsg("Bad line in %s: '%s'", file, buf);
         }
         else if(rtype) {
           logmsg("added %s record via '%s'", rtype, buf);

tests/server/rtspd.c

@@ -738,7 +738,7 @@ static int rtspd_send_doc(curl_socket_t sock, struct rtspd_httprequest *req)
       break;
     case DOCNUMBER_404:
     default:
-      logmsg("Replying to with a 404");
+      logmsg("Replying with a 404");
       if(req->protocol == RPROT_HTTP) {
         buffer = doc404_HTTP;
       }

tests/server/sws.c

@@ -721,7 +721,7 @@ static int sws_ProcessRequest(struct sws_httprequest *req)
      test case send a rejection before any such data has been sent. Test case
      154 uses this.*/
   if(req->auth_req && !req->auth) {
-    logmsg("Return early due to auth requested by none provided");
+    logmsg("Return early due to auth requested but none provided");
     return 1; /* done */
   }
 
@@ -813,7 +813,7 @@ static int sws_send_doc(curl_socket_t sock, struct sws_httprequest *req)
       break;
     case DOCNUMBER_404:
     default:
-      logmsg("Replying to with a 404");
+      logmsg("Replying with a 404");
       buffer = doc404;
       break;
     }
@@ -1893,11 +1893,11 @@ static int service_connection(curl_socket_t *msgsock,
   /* if we got a CONNECT, loop and get another request as well! */
 
   if(req->open) {
-    logmsg("=> persistent connection request ended, awaits new request\n");
+    logmsg("=> persistent connection request ended, awaits new request");
     return 1;
   }
   else {
-    logmsg("=> NOT a persistent connection, close close CLOSE\n");
+    logmsg("=> NOT a persistent connection, close close CLOSE");
   }
 
   return -1;
@@ -2036,7 +2036,7 @@ static int test_sws(int argc, const char *argv[])
         opt = argv[arg];
         if(curlx_str_number(&opt, &num, 0xffff)) {
           fprintf(stderr, "sws: invalid --keepalive argument (%s), must "
-                  "be number of seconds\n", argv[arg]);
+                  "be a number of seconds\n", argv[arg]);
           return 0;
         }
         keepalive_secs = (unsigned short)num;

tests/server/tftpd.c

@@ -287,7 +287,7 @@ static void nak(int error)
   memcpy(tp->th_msg, pe->e_msg, length + 1);
   length += 5;
   if(swrite(peer, &trsbuf.storage[0], length) != length)
-    logmsg("nak: fail\n");
+    logmsg("nak: fail");
 }
 
 /*

tests/server/util.c

@@ -336,23 +336,18 @@ typedef void (*SIGHANDLER_T)(int);
 #ifdef SIGHUP
 static SIGHANDLER_T old_sighup_handler  = SIG_ERR;
 #endif
-
 #ifdef SIGPIPE
 static SIGHANDLER_T old_sigpipe_handler = SIG_ERR;
 #endif
-
 #ifdef SIGALRM
 static SIGHANDLER_T old_sigalrm_handler = SIG_ERR;
 #endif
-
 #ifdef SIGINT
 static SIGHANDLER_T old_sigint_handler  = SIG_ERR;
 #endif
-
 #ifdef SIGTERM
 static SIGHANDLER_T old_sigterm_handler = SIG_ERR;
 #endif
-
 #if defined(SIGBREAK) && defined(_WIN32)
 static SIGHANDLER_T old_sigbreak_handler = SIG_ERR;
 #endif
@@ -502,8 +497,8 @@ static LRESULT CALLBACK main_window_proc(HWND hwnd, UINT uMsg,
   }
   return DefWindowProc(hwnd, uMsg, wParam, lParam);
 }
-/* Window message queue loop for hidden main window, details see above.
- */
+
+/* Window message queue loop for hidden main window, details see above. */
 static DWORD WINAPI main_window_loop(void *lpParameter)
 {
   WNDCLASS wc;