TUN-8052: Update go to 1.21.5

Also update golang.org/x/net and google.golang.org/grpc to fix vulnerabilities,
although cloudflared is using them in a way that is not exposed to those risks

vendor/google.golang.org/grpc/resolver/map.go

@@ -20,7 +20,7 @@ package resolver
 
 type addressMapEntry struct {
 	addr  Address
-	value interface{}
+	value any
 }
 
 // AddressMap is a map of addresses to arbitrary values taking into account
@@ -69,7 +69,7 @@ func (l addressMapEntryList) find(addr Address) int {
 }
 
 // Get returns the value for the address in the map, if present.
-func (a *AddressMap) Get(addr Address) (value interface{}, ok bool) {
+func (a *AddressMap) Get(addr Address) (value any, ok bool) {
 	addrKey := toMapKey(&addr)
 	entryList := a.m[addrKey]
 	if entry := entryList.find(addr); entry != -1 {
@@ -79,7 +79,7 @@ func (a *AddressMap) Get(addr Address) (value interface{}, ok bool) {
 }
 
 // Set updates or adds the value to the address in the map.
-func (a *AddressMap) Set(addr Address, value interface{}) {
+func (a *AddressMap) Set(addr Address, value any) {
 	addrKey := toMapKey(&addr)
 	entryList := a.m[addrKey]
 	if entry := entryList.find(addr); entry != -1 {
@@ -127,8 +127,8 @@ func (a *AddressMap) Keys() []Address {
 }
 
 // Values returns a slice of all current map values.
-func (a *AddressMap) Values() []interface{} {
-	ret := make([]interface{}, 0, a.Len())
+func (a *AddressMap) Values() []any {
+	ret := make([]any, 0, a.Len())
 	for _, entryList := range a.m {
 		for _, entry := range entryList {
 			ret = append(ret, entry.value)
@@ -136,3 +136,116 @@ func (a *AddressMap) Values() []interface{} {
 	}
 	return ret
 }
+
+type endpointNode struct {
+	addrs map[string]struct{}
+}
+
+// Equal returns whether the unordered set of addrs are the same between the
+// endpoint nodes.
+func (en *endpointNode) Equal(en2 *endpointNode) bool {
+	if len(en.addrs) != len(en2.addrs) {
+		return false
+	}
+	for addr := range en.addrs {
+		if _, ok := en2.addrs[addr]; !ok {
+			return false
+		}
+	}
+	return true
+}
+
+func toEndpointNode(endpoint Endpoint) endpointNode {
+	en := make(map[string]struct{})
+	for _, addr := range endpoint.Addresses {
+		en[addr.Addr] = struct{}{}
+	}
+	return endpointNode{
+		addrs: en,
+	}
+}
+
+// EndpointMap is a map of endpoints to arbitrary values keyed on only the
+// unordered set of address strings within an endpoint. This map is not thread
+// safe, thus it is unsafe to access concurrently. Must be created via
+// NewEndpointMap; do not construct directly.
+type EndpointMap struct {
+	endpoints map[*endpointNode]any
+}
+
+// NewEndpointMap creates a new EndpointMap.
+func NewEndpointMap() *EndpointMap {
+	return &EndpointMap{
+		endpoints: make(map[*endpointNode]any),
+	}
+}
+
+// Get returns the value for the address in the map, if present.
+func (em *EndpointMap) Get(e Endpoint) (value any, ok bool) {
+	en := toEndpointNode(e)
+	if endpoint := em.find(en); endpoint != nil {
+		return em.endpoints[endpoint], true
+	}
+	return nil, false
+}
+
+// Set updates or adds the value to the address in the map.
+func (em *EndpointMap) Set(e Endpoint, value any) {
+	en := toEndpointNode(e)
+	if endpoint := em.find(en); endpoint != nil {
+		em.endpoints[endpoint] = value
+		return
+	}
+	em.endpoints[&en] = value
+}
+
+// Len returns the number of entries in the map.
+func (em *EndpointMap) Len() int {
+	return len(em.endpoints)
+}
+
+// Keys returns a slice of all current map keys, as endpoints specifying the
+// addresses present in the endpoint keys, in which uniqueness is determined by
+// the unordered set of addresses. Thus, endpoint information returned is not
+// the full endpoint data (drops duplicated addresses and attributes) but can be
+// used for EndpointMap accesses.
+func (em *EndpointMap) Keys() []Endpoint {
+	ret := make([]Endpoint, 0, len(em.endpoints))
+	for en := range em.endpoints {
+		var endpoint Endpoint
+		for addr := range en.addrs {
+			endpoint.Addresses = append(endpoint.Addresses, Address{Addr: addr})
+		}
+		ret = append(ret, endpoint)
+	}
+	return ret
+}
+
+// Values returns a slice of all current map values.
+func (em *EndpointMap) Values() []any {
+	ret := make([]any, 0, len(em.endpoints))
+	for _, val := range em.endpoints {
+		ret = append(ret, val)
+	}
+	return ret
+}
+
+// find returns a pointer to the endpoint node in em if the endpoint node is
+// already present. If not found, nil is returned. The comparisons are done on
+// the unordered set of addresses within an endpoint.
+func (em EndpointMap) find(e endpointNode) *endpointNode {
+	for endpoint := range em.endpoints {
+		if e.Equal(endpoint) {
+			return endpoint
+		}
+	}
+	return nil
+}
+
+// Delete removes the specified endpoint from the map.
+func (em *EndpointMap) Delete(e Endpoint) {
+	en := toEndpointNode(e)
+	if entry := em.find(en); entry != nil {
+		delete(em.endpoints, entry)
+	}
+}