Add sha256 and sha512 checksums

That should suffice...

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/options.c b/options.c
index 35a08d3..9ba9ca5 100644
--- a/options.c
+++ b/options.c
@@ -621,6 +621,14 @@
 			    .oval = VERIFY_CRC7,
 			    .help = "Use crc7 checksums for verification",
 			  },
+			  { .ival = "sha256",
+			    .oval = VERIFY_SHA256,
+			    .help = "Use sha256 checksums for verification",
+			  },
+			  { .ival = "sha512",
+			    .oval = VERIFY_SHA512,
+			    .help = "Use sha512 checksums for verification",
+			  },
 			  {
 			    .ival = "null",
 			    .oval = VERIFY_NULL,