tidy-up: miscellaneous

- avoid "will" in builds scripts, scripts folder, curl_easy_ssls_export.md,
  and few other files.
- badwords: add "initialise", "nul terminated", "thread safety" and
  variations.
- prefer "null-terminat", where missing (two places).
- fix "null-terminat*" missing dash.
- hostip: merge two `#if` blocks.
- tool_doswin: fix comment
  Spotted by GitHub Code Quality
  Follow-up to 9a2663322c #17572
- fix stray spaces and newlines.

Closes #21638

tests/smbserver.py

@@ -125,7 +125,7 @@ def smbserver(options):
     smb_config.set("SERVER", "share type", "0")
     smb_config.set("SERVER", "path", SERVER_MAGIC)
 
-    # Have a share for tests.  These files will be autogenerated from the
+    # Have a share for tests.  These files are auto-generated from the
     # test input.
     smb_config.add_section("TESTS")
     smb_config.set("TESTS", "comment", "tests")
@@ -146,7 +146,7 @@ def smbserver(options):
 
     # Start a thread that cleanly shuts down the server on a signal
     with ShutdownHandler(smb_server):
-        # This will block until smb_server.shutdown() is called
+        # This blocks until smb_server.shutdown() is called
         smb_server.serve_forever()
 
     return 0