all: convert more code to use net/netip directly

perl -i -npe 's,netaddr.IPPrefixFrom,netip.PrefixFrom,' $(git grep -l -F netaddr.)
    perl -i -npe 's,netaddr.IPPortFrom,netip.AddrPortFrom,' $(git grep -l -F netaddr. )
    perl -i -npe 's,netaddr.IPPrefix,netip.Prefix,g' $(git grep -l -F netaddr. )
    perl -i -npe 's,netaddr.IPPort,netip.AddrPort,g' $(git grep -l -F netaddr. )
    perl -i -npe 's,netaddr.IP\b,netip.Addr,g' $(git grep -l -F netaddr. )
    perl -i -npe 's,netaddr.IPv6Raw\b,netip.AddrFrom16,g' $(git grep -l -F netaddr. )
    goimports -w .

Then delete some stuff from the net/netaddr shim package which is no
longer neeed.

Updates #5162

Change-Id: Ia7a86893fe21c7e3ee1ec823e8aba288d4566cd8
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

net/interfaces/interfaces_windows.go

@@ -7,6 +7,7 @@ package interfaces
 import (
 	"log"
 	"net"
+	"net/netip"
 	"net/url"
 	"strings"
 	"syscall"
@@ -27,7 +28,7 @@ func init() {
 	getPAC = getPACWindows
 }
 
-func likelyHomeRouterIPWindows() (ret netaddr.IP, ok bool) {
+func likelyHomeRouterIPWindows() (ret netip.Addr, ok bool) {
 	rs, err := winipcfg.GetIPForwardTable2(windows.AF_INET)
 	if err != nil {
 		log.Printf("routerIP/GetIPForwardTable2 error: %v", err)
@@ -94,7 +95,7 @@ func likelyHomeRouterIPWindows() (ret netaddr.IP, ok bool) {
 
 	if ret.IsValid() && !ret.IsPrivate() {
 		// Default route has a non-private gateway
-		return netaddr.IP{}, false
+		return netip.Addr{}, false
 	}
 
 	return ret, ret.IsValid()