chore: fix some comment typos (#3716)

Signed-off-by: curlwget <curlwget@icloud.com>

app/dns/nameserver.go

@@ -90,7 +90,7 @@ func NewClient(
 			ns.PrioritizedDomain = append(ns.PrioritizedDomain, localTLDsAndDotlessDomains...)
 			ns.OriginalRules = append(ns.OriginalRules, localTLDsAndDotlessDomainsRule)
 			// The following lines is a solution to avoid core panics（rule index out of range） when setting `localhost` DNS client in config.
-			// Because the `localhost` DNS client will apend len(localTLDsAndDotlessDomains) rules into matcherInfos to match `geosite:private` default rule.
+			// Because the `localhost` DNS client will append len(localTLDsAndDotlessDomains) rules into matcherInfos to match `geosite:private` default rule.
 			// But `matcherInfos` has no enough length to add rules, which leads to core panics (rule index out of range).
 			// To avoid this, the length of `matcherInfos` must be equal to the expected, so manually append it with Golang default zero value first for later modification.
 			// Related issues:

app/stats/channel_test.go

@@ -203,7 +203,7 @@ func TestStatsChannelBlocking(t *testing.T) {
 
 	// Test blocking channel publishing
 	go func() {
-		// Dummy messsage with no subscriber receiving, will block broadcasting goroutine
+		// Dummy message with no subscriber receiving, will block broadcasting goroutine
 		c.Publish(context.Background(), nil)
 
 		<-pauseCh

common/mux/client.go

@@ -22,7 +22,7 @@ import (
 )
 
 type ClientManager struct {
-	Enabled bool // wheather mux is enabled from user config
+	Enabled bool // whether mux is enabled from user config
 	Picker  WorkerPicker
 }
 

main/commands/base/execute.go

@@ -12,7 +12,7 @@ import (
 // Use of this source code is governed by a BSD-style
 // copied from "github.com/golang/go/main.go"
 
-// Execute excute the commands
+// Execute execute the commands
 func Execute() {
 	flag.Parse()
 	args := flag.Args()

proxy/proxy.go

@@ -319,7 +319,7 @@ func XtlsPadding(b *buf.Buffer, command byte, userUUID *[]byte, longPadding bool
 
 // XtlsUnpadding remove padding and parse command
 func XtlsUnpadding(b *buf.Buffer, s *TrafficState, ctx context.Context) *buf.Buffer {
-	if s.RemainingCommand == -1 && s.RemainingContent == -1 && s.RemainingPadding == -1 { // inital state
+	if s.RemainingCommand == -1 && s.RemainingContent == -1 && s.RemainingPadding == -1 { // initial state
 		if b.Len() >= 21 && bytes.Equal(s.UserUUID, b.BytesTo(16)) {
 			b.Advance(16)
 			s.RemainingCommand = 5