codespell: extend checks to more subdirs

- fix issues found.
- fix a few more found locally.

Closes #15072

docs/ECH.md

@@ -230,7 +230,7 @@ purpose. This code also implements the opportunistic (``--ech true``) or hard-fa
 (``--ech hard``) logic.
 
 Other than that, the main additions are in ``lib/doh.c``
-where we re-use ``dohprobe()`` to retrieve an HTTPS RR value for the target
+where we reuse ``dohprobe()`` to retrieve an HTTPS RR value for the target
 domain. If such a value is found, that is stored using a new ``doh_store_https()``
 function in a new field in the ``dohentry`` structure.
 
@@ -472,7 +472,7 @@ As of now we have not added support for using ``retry_config`` handling in the
 application - for a command line tool, one can just use ``dig`` (or ``kdig``)
 to get the HTTPS RR and pass the ECHConfigList from that on the command line,
 if needed, or one can access the value from command line output in verbose more
-and then re-use that in another invocation.
+and then reuse that in another invocation.
 
 Both our OpenSSL fork and BoringSSL have APIs for both controlling GREASE and
 accessing and logging ``retry_configs``, it seems wolfSSL has neither.

docs/TODO

@@ -1059,7 +1059,7 @@
 
 18.7 specify which response codes that make -f/--fail return error
 
- Allows a user to better specify exacly which error code(s) that are fine
+ Allows a user to better specify exactly which error code(s) that are fine
  and which are errors for their specific uses cases
 
 18.9 Choose the name of file in braces for complex URLs