Commit b6b66573 (PR #9679) renamed most POD files. This change causes
find-doc-nits to flag misnamed files.
Also fix the two misnamed files that it found.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/10000)
