server: use absolute paths to the {cert,key,ca} files
server: use absolute paths to the {cert,key,ca} files

This makes it easier to utilize the URL from a different directory than
the one the cockroach server started in.

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