all: use various net/netip parse funcs directly

Mechanical change with perl+goimports.

Changed {Must,}Parse{IP,IPPrefix,IPPort} to their netip variants, then
goimports -d .

Finally, removed the net/netaddr wrappers, to prevent future use.

Updates #5162

Change-Id: I59c0e38b5fbca5a935d701645789cddf3d7863ad
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

net/tsdial/dnsmap.go

@@ -9,6 +9,7 @@ import (
 	"errors"
 	"fmt"
 	"net"
+	"net/netip"
 	"strconv"
 	"strings"
 
@@ -68,7 +69,7 @@ func dnsMapFromNetworkMap(nm *netmap.NetworkMap) dnsMap {
 		if rec.Type != "" {
 			continue
 		}
-		ip, err := netaddr.ParseIP(rec.Value)
+		ip, err := netip.ParseAddr(rec.Value)
 		if err != nil {
 			continue
 		}
@@ -103,7 +104,7 @@ func (m dnsMap) resolveMemory(ctx context.Context, network, addr string) (_ neta
 		// addr malformed or invalid port.
 		return netaddr.IPPort{}, err
 	}
-	if ip, err := netaddr.ParseIP(host); err == nil {
+	if ip, err := netip.ParseAddr(host); err == nil {
 		// addr was literal ip:port.
 		return netaddr.IPPortFrom(ip, port), nil
 	}

net/tsdial/dnsmap_test.go

@@ -5,6 +5,7 @@
 package tsdial
 
 import (
+	"net/netip"
 	"reflect"
 	"testing"
 
@@ -14,8 +15,8 @@ import (
 )
 
 func TestDNSMapFromNetworkMap(t *testing.T) {
-	pfx := netaddr.MustParseIPPrefix
-	ip := netaddr.MustParseIP
+	pfx := netip.MustParsePrefix
+	ip := netip.MustParseAddr
 	tests := []struct {
 		name string
 		nm   *netmap.NetworkMap

net/tsdial/tsdial.go

@@ -11,6 +11,7 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"net/netip"
 	"runtime"
 	"strings"
 	"sync"
@@ -330,7 +331,7 @@ func (d *Dialer) dialPeerAPI(ctx context.Context, network, addr string) (net.Con
 	default:
 		return nil, fmt.Errorf("peerAPI dial requires tcp; %q not supported", network)
 	}
-	ipp, err := netaddr.ParseIPPort(addr)
+	ipp, err := netip.ParseAddrPort(addr)
 	if err != nil {
 		return nil, fmt.Errorf("peerAPI dial requires ip:port, not name resolution: %w", err)
 	}