When its 'reset' input is active, the output will always be off (=false).
When the 'set' input is active, the output will be turned on.
Once the 'set' input becomes inactive, the output will remain on for 'period'
seconds and then turn off.
A parameter called 'force' allows the block to be forced into the 'set' or
'reset' states.

	new file:   block/block_oneshot.c