Check non-option arguments

Make sure all commands check to see if there are any "extra" arguments
after the options, and print an error if so.

Made all error messages consistent (which is to say, minimal).

Fixes: #13527

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/13563)

1 files changed, 2 insertions, 0 deletions

diff --git a/apps/ca.c b/apps/ca.c
index 82b008cbce..2772072b79 100755
--- a/apps/ca.c
+++ b/apps/ca.c
@@ -488,7 +488,9 @@ opthelp:
             break;
         }
     }
+
 end_of_options:
+    /* Remaining args are files to certify. */
     argc = opt_num_rest();
     argv = opt_rest();