trimStrings = append(trimStrings, filepath.Join(goRootString, "src")+string(filepath.Separator))
	}

	for _, defaultgoPathString := range defaultgoPathList {
		trimStrings = append(trimStrings, filepath.Join(defaultgoPathString, "src")+string(filepath.Separator))
	}

	for _, defaultgoRootString := range defaultgoRootList {

func ParseSetCookie(line string) (*Cookie, error) {
	parts := strings.Split(textproto.TrimString(line), ";")
	if len(parts) == 1 && parts[0] == "" {
		return nil, errBlankCookie
	}
	parts[0] = textproto.TrimString(parts[0])
	name, value, ok := strings.Cut(parts[0], "=")
	if !ok {
		return nil, errEqualNotFoundInCookie
	}
	name = textproto.TrimString(name)
	if !isCookieNameValid(name) {
		return nil, errInvalidCookieName
	}

	noOverlap := false
	for _, ra := range strings.Split(s[len(b):], ",") {
		ra = textproto.TrimString(ra)
		if ra == "" {
			continue
		}
		start, end, ok := strings.Cut(ra, "-")
		if !ok {
			return nil, errors.New("invalid range")
		}
		start, end = textproto.TrimString(start), textproto.TrimString(end)
		var r httpRange
		if start == "" {
			// If no start is specified, end specifies the

			// way to provide the error back to the server
			// handler, so just drop invalid headers instead.
			continue
		}
		for _, v := range kv.values {
			v = headerNewlineToSpace.Replace(v)
			v = textproto.TrimString(v)
			for _, s := range []string{kv.key, ": ", v, "\r\n"} {
				if _, err := ws.WriteString(s); err != nil {
					headerSorterPool.Put(sorter)
					return err
				}
			}

		// Content-Length headers if they differ in value.
		// If there are dups of the value, remove the dups.
		// See Issue 16490.
		first := textproto.TrimString(contentLens[0])
		for _, ct := range contentLens[1:] {
			if first != textproto.TrimString(ct) {
				return 0, fmt.Errorf("http: message cannot contain multiple Content-Length headers; got %q", contentLens)
			}
		}

		// deduplicate Content-Length

			h.printf("cgi: bogus header line: %s", line)
			continue
		}
		if !httpguts.ValidHeaderFieldName(header) {
			h.printf("cgi: invalid header name: %q", header)
			continue
		}
		val = textproto.TrimString(val)
		switch {
		case header == "Status":
			if len(val) < 3 {
				h.printf("cgi: bogus status (short): %q", val)
				return
			}
			code, err := strconv.Atoi(val[0:3])
			if err != nil {

	userAgent := defaultUserAgent
	if r.Header.has("User-Agent") {
		userAgent = r.Header.Get("User-Agent")
	}
	if userAgent != "" {
		userAgent = headerNewlineToSpace.Replace(userAgent)
		userAgent = textproto.TrimString(userAgent)
		_, err = fmt.Fprintf(w, "User-Agent: %s\r\n", userAgent)
		if err != nil {
			return err
		}
		if trace != nil && trace.WroteHeaderField != nil {

func foreachHeaderElement(v string, fn func(string)) {
	v = textproto.TrimString(v)
	if v == "" {
		return
	}
	if !strings.Contains(v, ",") {
		fn(v)
		return
	}
	for _, f := range strings.Split(v, ",") {
		if f = textproto.TrimString(f); f != "" {
			fn(f)
		}
	}
}

func http2foreachHeaderElement(v string, fn func(string)) {
	v = textproto.TrimString(v)
	if v == "" {
		return
	}
	if !strings.Contains(v, ",") {
		fn(v)
		return
	}
	for _, f := range strings.Split(v, ",") {
		if f = textproto.TrimString(f); f != "" {
			fn(f)
		}
	}
}

// From http://httpwg.org/specs/rfc7540.html#rfc.section.8.1.2.2

		{"NewReader", Func, 0},
		{"NewWriter", Func, 0},
		{"Pipeline", Type, 0},
		{"ProtocolError", Type, 0},
		{"Reader", Type, 0},
		{"Reader.R", Field, 0},
		{"TrimBytes", Func, 1},
		{"TrimString", Func, 1},
		{"Writer", Type, 0},
		{"Writer.W", Field, 0},
	},
	"net/url": {
		{"(*Error).Error", Method, 0},
		{"(*Error).Temporary", Method, 6},
		{"(*Error).Timeout", Method, 6},