quilt: Correct usage message
quilt: Correct usage message

Before, the usage message implied that you could optionally set
the log level or set the socket, these being mutually exclusive.
This is not the case, as both flags can be given at once. This
patch separates the flags into two optional groups in the usage.

kayousterhout/quilt,LuiseV/quilt,LuiseV/quilt,quilt/quilt,kklin/kelda,kelda/kelda,kklin/kelda,LuiseV/quilt,ejj/quilt-dev,quilt/quilt,stevenlin598/quilt,kklin/kelda,kayousterhout/quilt,kklin/quilt,mmussomele/quilt,quilt/quilt,ZhongtianWang/quilt,LuiseV/quilt,ZhongtianWang/quilt,secant/quilt,stevenlin598/quilt,NetSys/quilt,akshayknarayan/quilt,ejj/quilt-dev,ejj/quilt-dev,PenguinToast/quilt,kklin/quilt,PenguinToast/quilt,secant/quilt,secant/quilt,akshayknarayan/quilt,quilt/quilt,LuiseV/quilt,stevenlin598/quilt,PenguinToast/quilt,stevenlin598/quilt,PenguinToast/quilt,akshayknarayan/quilt,NetSys/quilt,tejasmanohar/quilt,ejj/quilt-dev,tejasmanohar/quilt,secant/quilt,kayousterhout/quilt,mmussomele/quilt,mmussomele/quilt,kayousterhout/quilt,kelda/kelda,ZhongtianWang/quilt,NetSys/quilt,kklin/quilt,tejasmanohar/quilt,kelda/kelda,ZhongtianWang/quilt,PenguinToast/quilt,mmussomele/quilt,stevenlin598/quilt,tejasmanohar/quilt,mmussomele/quilt,secant/quilt,kklin/quilt,NetSys/quilt,stevenlin598/quilt,NetSys/quilt,kelda/kelda,kklin/kelda,mmussomele/quilt,akshayknarayan/quilt