chutney shouldn't set DirPort on bridge relays
../chutney/net/nodes/008br/notice.log:Sep 15 23:24:25.859 [warn] Can't set a DirPort on a bridge relay; disabling DirPort
../chutney/net/nodes/008br/notice.log:Sep 15 23:24:25.859 [warn] Can't set a DirPort on a bridge relay; disabling DirPort