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

.github/workflows/linux.yml

@@ -580,7 +580,7 @@ jobs:
       - name: 'build openssl (thread sanitizer)'
         if: ${{ contains(matrix.build.install_steps, 'openssl-tsan') && steps.cache-openssl-tsan.outputs.cache-hit != 'true' }}
         run: |
-          git clone --quiet --depth=1 -b "openssl-${OPENSSL_VERSION}" https://github.com/openssl/openssl
+          git clone --quiet --depth 1 -b "openssl-${OPENSSL_VERSION}" https://github.com/openssl/openssl
           cd openssl
           CC=clang CFLAGS='-fsanitize=thread' LDFLAGS='-fsanitize=thread' ./config --prefix=/home/runner/openssl --libdir=lib no-makedepend no-apps no-docs no-tests
           make