update 'net' package from 1.19.3 to 1.20.5

parse.go

@@ -1,4 +1,4 @@
-// TINYGO: The following is copied from Go 1.19.3 official implementation.
+// TINYGO: The following is copied from Go 1.20.5 official implementation.
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
@@ -238,7 +238,7 @@ func lowerASCII(b byte) byte {
 }
 
 // trimSpace returns x without any leading or trailing ASCII whitespace.
-func trimSpace(x []byte) []byte {
+func trimSpace(x string) string {
 	for len(x) > 0 && isSpace(x[0]) {
 		x = x[1:]
 	}
@@ -255,37 +255,19 @@ func isSpace(b byte) bool {
 
 // removeComment returns line, removing any '#' byte and any following
 // bytes.
-func removeComment(line []byte) []byte {
-	if i := bytealg.IndexByte(line, '#'); i != -1 {
+func removeComment(line string) string {
+	if i := bytealg.IndexByteString(line, '#'); i != -1 {
 		return line[:i]
 	}
 	return line
 }
 
-// foreachLine runs fn on each line of x.
-// Each line (except for possibly the last) ends in '\n'.
-// It returns the first non-nil error returned by fn.
-func foreachLine(x []byte, fn func(line []byte) error) error {
-	for len(x) > 0 {
-		nl := bytealg.IndexByte(x, '\n')
-		if nl == -1 {
-			return fn(x)
-		}
-		line := x[:nl+1]
-		x = x[nl+1:]
-		if err := fn(line); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
 // foreachField runs fn on each non-empty run of non-space bytes in x.
 // It returns the first non-nil error returned by fn.
-func foreachField(x []byte, fn func(field []byte) error) error {
+func foreachField(x string, fn func(field string) error) error {
 	x = trimSpace(x)
 	for len(x) > 0 {
-		sp := bytealg.IndexByte(x, ' ')
+		sp := bytealg.IndexByteString(x, ' ')
 		if sp == -1 {
 			return fn(x)
 		}