attempt best-effort stop on panic
attempt best-effort stop on panic

this is going to be necessary with the next commits
which will use panic() for the cli commands.

nieyy/cockroach,bg451/cockroach,bg451/cockroach,arjun4084346/cockroach,vaibhavarora/cockroach,nieyy/cockroach,vaibhavarora/cockroach,vaibhavarora/cockroach,nieyy/cockroach,cuongdo/cockroach,glycerine/cockroach,cuongdo/cockroach,marcuswestin/cockroach,nieyy/cockroach,cockroachdb/cockroach,sunya123/cockroach,vaibhavarora/cockroach,glycerine/cockroach,paperstreet/cockroach,arjun4084346/cockroach,cockroachdb/cockroach,glycerine/cockroach,cockroachdb/cockroach,sunya123/cockroach,paperstreet/cockroach,glycerine/cockroach,vaibhavarora/cockroach,bg451/cockroach,cockroachdb/cockroach,sunya123/cockroach,marcuswestin/cockroach,paperstreet/cockroach,marcuswestin/cockroach,vivekmenezes/cockroach,cockroachdb/cockroach,nieyy/cockroach,nieyy/cockroach,bg451/cockroach,petermattis/cockroach,paperstreet/cockroach,il9ue/cockroach,il9ue/cockroach,veteranlu/cockroach,maxlang/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,cuongdo/cockroach,arjun4084346/cockroach,vivekmenezes/cockroach,il9ue/cockroach,arjun4084346/cockroach,vivekmenezes/cockroach,cuongdo/cockroach,arjun4084346/cockroach,paperstreet/cockroach,veteranlu/cockroach,glycerine/cockroach,il9ue/cockroach,petermattis/cockroach,sunya123/cockroach,arjun4084346/cockroach,maxlang/cockroach,il9ue/cockroach,vivekmenezes/cockroach,sunya123/cockroach,il9ue/cockroach,il9ue/cockroach,marcuswestin/cockroach,marcuswestin/cockroach,maxlang/cockroach,cuongdo/cockroach,glycerine/cockroach,petermattis/cockroach,maxlang/cockroach,bg451/cockroach,vivekmenezes/cockroach,maxlang/cockroach,veteranlu/cockroach,veteranlu/cockroach,cuongdo/cockroach,cockroachdb/cockroach,marcuswestin/cockroach,petermattis/cockroach,veteranlu/cockroach,arjun4084346/cockroach,marcuswestin/cockroach,vivekmenezes/cockroach,vaibhavarora/cockroach,petermattis/cockroach,sunya123/cockroach,marcuswestin/cockroach,arjun4084346/cockroach,petermattis/cockroach,petermattis/cockroach,petermattis/cockroach,veteranlu/cockroach,glycerine/cockroach,maxlang/cockroach,il9ue/cockroach,cockroachdb/cockroach,sunya123/cockroach,veteranlu/cockroach,vivekmenezes/cockroach,glycerine/cockroach,cuongdo/cockroach,paperstreet/cockroach,maxlang/cockroach,cuongdo/cockroach,veteranlu/cockroach,paperstreet/cockroach,nieyy/cockroach,nieyy/cockroach,sunya123/cockroach,bg451/cockroach,vaibhavarora/cockroach,bg451/cockroach,vivekmenezes/cockroach,maxlang/cockroach,paperstreet/cockroach