fix documentation

TODO.markdown

@@ -6,7 +6,7 @@ be fixed.
 * Speed, we can always go faster. A simple reflect server now hits 35/45K qps
 * go test; only works correct on my machine
 * privatekey.Precompute() when signing? 
-* outgoing xfr fixen
+* outgoing [AI]xfr
 * zonereader that extracts glue (or at least signals it) and other usefull stuff?
 
 ## Examples to add

client.go

@@ -306,7 +306,7 @@ func (c *Client) Exchange(m *Msg, a string) (r *Msg, err error) {
 // contained in a and waits for an reply. Basic use pattern with a *Client:
 //
 //	c := dns.NewClient()
-//	in, rtt, addr, err := c.Exchange(message, "127.0.0.1:53")
+//	in, rtt, addr, err := c.ExchangeFull(message, "127.0.0.1:53")
 // 
 // The 'addr' return value is superfluous in this case, but it is here to retain symmetry
 // with the asynchronous call, see Client.Do().

xfr.go

@@ -2,15 +2,16 @@ package dns
 
 // XfrReceives requests an incoming Ixfr or Axfr. If the message q's question
 // section has type TypeAXFR an Axfr is performed, if it is TypeIXFR it does an Ixfr.
-// The [AI]xfr's records are returned on the channel. Note the with an IXFR the client
+// The [AI]xfr's records are returned on the channel. Note that with an IXFR the client
 // needs to determine if records are to be removed are added.
 // The channel is closed when the transfer is terminated.
 //
 // Basic use pattern for setting up a transfer:
 //
+//	// m contains the [AI]xfr request
 //	t, _ := client.XfrReceive(m, "127.0.0.1:53")
 //	for r := range t {
-//		// 
+//		// ... deal with r.Reply or r.Error
 //	}
 func (c *Client) XfrReceive(q *Msg, a string) (chan *Exchange, error) {
 	w := new(reply)