tidy-up: miscellaneous

- vms/curlmsg_vms.h: delete unused/commented code.
- vtls/schannel_verify: sort includes.
- typecheck-gcc.h: fix indent and alignment.
- lib/config-win32.h: drop idle `#undef`.
- spacecheck: check for stray empty lines before after curly braces.
- make literals more readable: 1048576 -> 1024 * 1024
- scope variables.
- use ISO date in a comment.
- drop redundant parentheses.
- drop empty comments.
- unfold lines.
- duplicate/stray spaces in comments.
- fix indent, whitespace, minor typos.

Closes #20690

src/tool_parsecfg.c

@@ -209,7 +209,8 @@ ParameterError parseconfig(const char *filename, int max_recursive,
       }
 
 #ifdef DEBUG_CONFIG
-      curl_mfprintf(tool_stderr, "PARAM: \"%s\"\n",(param ? param : "(null)"));
+      curl_mfprintf(tool_stderr, "PARAM: \"%s\"\n",
+                    (param ? param : "(null)"));
 #endif
       res = getparameter(option, param, &usedarg, config, max_recursive);
       config = global->last;