added `killall.js` option to kill only named scripts. fixed `void_server_buy_or_upgrade` regression that prevented it from working when you don't have servers.

Created by  jesse <nicoty@tuta.io>  on April 14, 2020
BCM3TZOSIZSGCROXIWDIZBZPMWDAPUVYVFS6LJNMLMEI5AOMHFAQC
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