Get rid of names attached to Links.

This is simply no need for the names on links,
other then for debug messages, and there are
better ways to handle that.

net_event.cc

@@ -251,7 +251,6 @@ NetEvProbe::NetEvProbe(NetScope*s, perm_string n, NetEvent*tgt,
 {
       for (unsigned idx = 0 ;  idx < p ;  idx += 1) {
 	    pin(idx).set_dir(Link::INPUT);
-	    pin(idx).set_name(perm_string::literal("P"));
       }
 
       enext_ = event_->probes_;