routertest: add small program to interface with router
routertest: add small program to interface with router

For issue #192, mimic the way the relay uses the routing mechanism.

piotr1212/carbon-c-relay,grobian/carbon-c-relay,piotr1212/carbon-c-relay,piotr1212/carbon-c-relay,grobian/carbon-c-relay,grobian/carbon-c-relay,piotr1212/carbon-c-relay