Avoid stropts.h to fix compilation.

There is no stropts.h on my system.
Also the documentation says to include sys/ioctl.h
for ioctl().
The files do not seem to use the streams interface
(e.g. strioctl struct) that stropts.h is intended
to be used for.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>