from the DB when the routertype is "static" since those images are
likely to not have ddijk support on them. Newer images will have
ddijk, and so will compute the routes themselves; do not send them
back. Note that static-old implies that nodes will get the routes no
matter what, although old images will probably barf if gets that; I
don't view this as a problem since very people are going to request
static-old.