misc/other: spelling fixes

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
diff --git a/nbd/client-connection.c b/nbd/client-connection.c
index 3d14296..258ef81 100644
--- a/nbd/client-connection.c
+++ b/nbd/client-connection.c
@@ -197,7 +197,7 @@
          * conn->updated_info will finally be returned to the user. Clear the
          * pointers to our internally allocated strings, which are IN parameters
          * of nbd_receive_negotiate() and therefore nbd_connect(). Caller
-         * shoudn't be interested in these fields.
+         * shouldn't be interested in these fields.
          */
         conn->updated_info.x_dirty_bitmap = NULL;
         conn->updated_info.name = NULL;