slightly change usage information

apps/smime.c

diff --git a/apps/smime.c b/apps/smime.c
index d5461f1..3b80983 100644
--- a/apps/smime.c
+++ b/apps/smime.c
@@ -253,10 +253,9 @@
 		BIO_printf (bio_err, "-nodetach      use opaque signing\n");
 		BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");
 		BIO_printf (bio_err, "-binary        don't translate message to text\n");
-		BIO_printf (bio_err, "-in file       input file\n");
 		BIO_printf (bio_err, "-certfile file other certificates file\n");
 		BIO_printf (bio_err, "-signer file   signer certificate file\n");
-		BIO_printf (bio_err, "-recip  file   recipient certificate file\n");
+		BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");
 		BIO_printf (bio_err, "-in file       input file\n");
 		BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");
 		BIO_printf (bio_err, "-out file      output file\n");
@@ -266,7 +265,7 @@
 		BIO_printf (bio_err, "-text          include or delete text MIME headers\n");
 		BIO_printf (bio_err, "-CApath dir    trusted certificates directory\n");
 		BIO_printf (bio_err, "-CAfile file   trusted certificates file\n");
-		BIO_printf (bio_err, "cert.pem       recipient certificate(s)\n");
+		BIO_printf (bio_err, "cert.pem       recipient certificate(s) for encryption\n");
 		goto end;
 	}