tidy-up: miscellaneous

- schannel: delete superfluous parenthesis.
- tftp: delete stray space from log output.
- ws: update guard comment.
- docs/examples: constify variables.
- runtests/servers: enclose unknown parameter between quotes.
- scripts/perlcheck.sh: drop redundant grep `-E` option.
- THANKS: move names from comments to THANKS.
- sync `--depth` option style across scripts.
- sync git repo URL ending between some scripts.
- BINDINGS.md: drop protocol from archive.org URL path.
- whitespace, indent, unfold lines.

Closes #19565

scripts/mk-ca-bundle.pl

@@ -357,7 +357,7 @@ if(!$opt_n) {
             report "LWP is not available (LWP::UserAgent not found)";
             exit 1;
         }
-        my $ua  = new LWP::UserAgent(agent => "$0/$version");
+        my $ua = new LWP::UserAgent(agent => "$0/$version");
         $ua->env_proxy();
         $resp = $ua->mirror($url, $txt);
         if($resp && $resp->code eq '304') {