fix  https://github.com/sagemathinc/cocalc/issues/3506a - too many sage servers started at once
fix  https://github.com/sagemathinc/cocalc/issues/3506a - too many sage servers started at once

sagemathinc/smc,DrXyzzy/smc,tscholl2/smc,tscholl2/smc,sagemathinc/smc,tscholl2/smc,sagemathinc/smc,sagemathinc/smc,DrXyzzy/smc,tscholl2/smc,DrXyzzy/smc,DrXyzzy/smc,tscholl2/smc