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/dns/publicdns/publicdns.go

@@ -7,6 +7,7 @@
 package publicdns
 
 import (
+	"net/netip"
 	"sync"
 
 	"tailscale.com/net/netaddr"
@@ -45,7 +46,7 @@ func DoHV6(base string) (ip netaddr.IP, ok bool) {
 // addDoH parses a given well-formed ip string into a netaddr.IP type and
 // adds it to both knownDoH and dohIPsOFBase maps.
 func addDoH(ipStr, base string) {
-	ip := netaddr.MustParseIP(ipStr)
+	ip := netip.MustParseAddr(ipStr)
 	knownDoH[ip] = base
 	dohIPsOfBase[base] = append(dohIPsOfBase[base], ip)
 }

net/dns/publicdns/publicdns_test.go

@@ -5,6 +5,7 @@
 package publicdns
 
 import (
+	"net/netip"
 	"testing"
 
 	"tailscale.com/net/netaddr"
@@ -26,8 +27,8 @@ func TestDohV6(t *testing.T) {
 		firstIP netaddr.IP
 		want    bool
 	}{
-		{"https://cloudflare-dns.com/dns-query", netaddr.MustParseIP("2606:4700:4700::1111"), true},
-		{"https://dns.google/dns-query", netaddr.MustParseIP("2001:4860:4860::8888"), true},
+		{"https://cloudflare-dns.com/dns-query", netip.MustParseAddr("2606:4700:4700::1111"), true},
+		{"https://dns.google/dns-query", netip.MustParseAddr("2001:4860:4860::8888"), true},
 		{"bogus", netaddr.IP{}, false},
 	}
 	for _, test := range tests {