Fix various doc nits.

find-doc-nits warns if you don't give a "what to do flag"
Don't use regexps for section names, just strings:  More consistency.
Rename "COMMAND OPTIONS" to OPTIONS.
Fix a couple of other nit-level things.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2076)
diff --git a/doc/man1/ciphers.pod b/doc/man1/ciphers.pod
index 007aa85..c1d1cb2 100644
--- a/doc/man1/ciphers.pod
+++ b/doc/man1/ciphers.pod
@@ -28,7 +28,7 @@
 SSL cipher preference lists. It can be used as a test tool to determine
 the appropriate cipherlist.
 
-=head1 COMMAND OPTIONS
+=head1 OPTIONS
 
 =over 4