score: New state STATES_WAITING_FOR_BSD_WAKEUP

This state is necessery to implement the SLEEP(9) FreeBSD kernel API.
Filesystem: Zero flags in rtems_libio_free()
Filesystem: Clear open flag early in close()

This helps to prevent the usage of a file descriptor which is about to
close in some situations.
libmd: Change MD5Update() prototype

This is in line with the FreeBSD and OpenSSL prototypes.  It helps to
avoid superfluous compiler warnings.
Filesystem: Documentation
Filesystem: Use ENOTTY for default ioctl() handler

This is in line with Linux and FreeBSD.