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

tests/getpart.pm

@@ -398,7 +398,7 @@ sub writearray {
     my ($filename, $arrayref)=@_;
 
     open(my $temp, ">", "$filename") || die "Failure writing file";
-    binmode($temp,":raw");  # Cygwin fix by Kevin Roth
+    binmode($temp,":raw");  # Cygwin fix
     for(@$arrayref) {
         print $temp $_;
     }