go vet fixes

labels.go

@@ -98,7 +98,6 @@ func CountLabel(s string) (labels int) {
 			return
 		}
 	}
-	panic("dns: not reached")
 }
 
 // Split splits a name s into its label indexes.
@@ -119,7 +118,6 @@ func Split(s string) []int {
 		}
 		idx = append(idx, off)
 	}
-	panic("dns: not reached")
 }
 
 // NextLabel returns the index of the start of the next label in the

server.go

@@ -456,7 +456,6 @@ func (srv *Server) serveTCP(l *net.TCPListener) error {
 		srv.wgTCP.Add(1)
 		go srv.serve(rw.RemoteAddr(), handler, m, nil, nil, rw)
 	}
-	panic("dns: not reached")
 }
 
 // serveUDP starts a UDP listener for the server.
@@ -492,7 +491,6 @@ func (srv *Server) serveUDP(l *net.UDPConn) error {
 		srv.wgUDP.Add(1)
 		go srv.serve(s.RemoteAddr(), handler, m, l, s, nil)
 	}
-	panic("dns: not reached")
 }
 
 // Serve a new connection.

xfr.go

@@ -91,7 +91,6 @@ func (t *Transfer) inAxfr(id uint16, c chan *Envelope) {
 			c <- &Envelope{in.Answer, nil}
 		}
 	}
-	panic("dns: not reached")
 }
 
 func (t *Transfer) inIxfr(id uint16, c chan *Envelope) {