Add quit to system, add system to default search path, to let user have readily available command to quit Factor

[nomennescio]

See also #2937.

John's comment about that:
"add quit as an alias for 0 exit in system, and then close-all-windows as a shutdown hook, and then add system as a normal used vocab"

[nomennescio]

@mrjbq7 , question about this implementation scheme; currently 0 exit hard exits without calling close-all-windows, would calling close-all-windows at shutdown be safe to deal with a Factor that's not responsive in UI code or has a bug in e.g. user code?

[nomennescio]

@mrjbq7 I noticed you already (partially) implemented this. Doesn't ce2bc44 also not require a call to notify-queued?

[mrjbq7]

probably yes, and then maybe change com-exit to be an alias to quit

[mrjbq7]

quit/exit is not safe to factor bugs and can hang I think that’s okay, as you always have task manager / pkill to be the backup plan and usually there aren’t bugs. Do you think different?

[mrjbq7]

Maybe this fixes if bfb58c5

[mrjbq7]

Except for the USE: system which is a restart which is fine for now, I don't know if os/cpu/vm-* stuff makes sense to be in the normal using, have to think about it.

What do you think?

[nomennescio]

Except for the USE: system which is a restart which is fine for now, I don't know if os/cpu/vm-* stuff makes sense to be in the normal using, have to think about it.

What do you think?

It works fine at my end; but would like to have either system in the standard search path, or in another vocab that's loaded at startup such that quit always works.

[mrjbq7]

Fixed in 938d99b.