server: `log.Fatal` on panic
server: `log.Fatal` on panic

Fixes #625.

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