Add some missing options to the man page

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/fio.1 b/fio.1
index 4ae0a5c..2eb4455 100644
--- a/fio.1
+++ b/fio.1
@@ -212,6 +212,8 @@
 .TP
 .B roundrobin
 Round robin over open files (default).
+.B sequential
+Do each file in the set sequentially.
 .RE
 .P
 The number of I/Os to issue before switching a new file can be specified by
@@ -445,6 +447,9 @@
 .BI create_fsync \fR=\fPbool
 \fIfsync\fR\|(2) data file after creation.  Default: true.
 .TP
+.BI create_on_open \fR=\fPbool
+If true, the files are not created until they are opened for IO by the job.
+.TP
 .BI unlink \fR=\fPbool
 Unlink job files when done.  Default: false.
 .TP