Set SO_REUSEADDR and SO_REUSEPORT before bind().
Set SO_REUSEADDR and SO_REUSEPORT before bind().

Per specification.  Only set for multicast ports, caused problems
specifically with Windows XP, but specs say that SO_REUSEPORT should
be set before bind() anyways.

git-svn-id: eb2ed70f8ecdcb6511b104a3e55a8be155f8dd4a@197 8a0476ba-7714-0410-bd95-fb3ea4a72f84

island-org/liblo,johne53/MB3Liblo,fsateler/liblo,johne53/MB3Liblo,island-org/liblo,johne53/MB3Liblo,tuscland/liblo,fsateler/liblo,radarsat1/liblo,radarsat1/liblo,johne53/MB3Liblo,tuscland/liblo,radarsat1/liblo,kneitinger/liblo,umlaeute/liblo,umlaeute/liblo,kneitinger/liblo,fsateler/liblo,island-org/liblo,kneitinger/liblo,umlaeute/liblo,tuscland/liblo