new copyright; att/bsd/shared

4.3BSD release version

Add copyright

add instruction to trampoline code

ast's set only temporarily, cancelled by swtch;
clear runrun in swtch after idle; break idle loop out of swtch
and straighten out the path through swtch

4.2 distribution

new signals

add PME_CLR

missing pcb_{fp,ap}

cosmetics

%G%->%E%

ast and hard/soft clock

stamp for 4bsd

%H%->%G%

date and time created 80/04/09 16:24:48 by bill