Clarify SMB2/SMB3 create context and add missing ones

Clarify comments for create contexts which we do send,
and fix typo in one create context definition and add
newer SMB3 create contexts to the list.

Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 35ddc3e..787844b 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1047,6 +1047,7 @@
 	buf->ccontext.NameOffset = cpu_to_le16(offsetof
 				(struct create_lease, Name));
 	buf->ccontext.NameLength = cpu_to_le16(4);
+	/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
 	buf->Name[0] = 'R';
 	buf->Name[1] = 'q';
 	buf->Name[2] = 'L';
@@ -1073,6 +1074,7 @@
 	buf->ccontext.NameOffset = cpu_to_le16(offsetof
 				(struct create_lease_v2, Name));
 	buf->ccontext.NameLength = cpu_to_le16(4);
+	/* SMB2_CREATE_REQUEST_LEASE is "RqLs" */
 	buf->Name[0] = 'R';
 	buf->Name[1] = 'q';
 	buf->Name[2] = 'L';