o use new style prototypes and function definitions o signal handlers need an argument. Mark it unused.
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
imported the rpc.sprayd from NetBSD - it is used by the new spray command for network analysis
