crash
@2011-02-19 01:46:00 GMT info save-dump +dump.2011-02-19T01-46-00+0000
bavarian forwards from A5 to B7 but B7/J was set against it, so fault
previous attempts via the UI to set B7/J weren't successful, but accelerating
 towards the junction showed it apparently going on through A5 to A6
 but actually A5/J was reversed

bessar hidraw so we can have gamepad

bugs
	at converging points eg X8, can we make train
		go from (say) X6 fast enough that when we stop
		it it fouls the dynamic envelope for X4-X8
		but doesn't enter X8 and thus signalling system
		allows crash ?

gui bugs
	speedw-redisplay-speed can crash reading unset variable
		gcommanded when trying to switch away from current
		train after realtime crashed; presumably some state
		is not properly sorted out ?

allegedly fixed, but untested
	current set of stuff on liberator
liberator:trains> rsync -vPI bessar:/bessar/bessar/playground/+dump.2008-07-28T00-02-43+0100/* hostside/
		* wrongly says santafe impeded by shinkansen when
		  we try to reverse it (look from tail of log)
		* when we tell it to go it has a fit about A2

	if train was abutting section boundary and is told to go,
		maxinto is not updated properly, so if it is then
		told to stop it stops owning the segment it may have
		just entered
	to reproduce: put shinkansen nose car at A6 (home location)
		and nothing else.  command speed 1 then speed 0
		should now own X12 too but does not

bugs
	should expire dumps, eventually
		
	does not set serial port mode etc.
	when checking future polarity possibility, does not account
		for MARGIN_POLARISETIME - it just checks to see if
		extending front before reducing rear is sufficient
		this will not work if there are segments which are
		traversed more quickly than MARGIN_POLARISETIME

	movpos++ when under train does not work - is ignored and gives ok

want to
	stop all trains command ?
	stop and turn off calmly when ^D
	why FAULT reported when power is turned off ?

things not yet considered at all in safety code:
	min. curve specifications

would be nice to do something with POINTED