fix openbsd

vendor/golang.org/x/net/webdav/if.go

@@ -24,7 +24,7 @@ type ifList struct {
 
 // parseIfHeader parses the "If: foo bar" HTTP header. The httpHeader string
 // should omit the "If:" prefix and have any "\r\n"s collapsed to a " ", as is
-// returned by req.Header.Get("If") for a http.Request req.
+// returned by req.Header.Get("If") for an http.Request req.
 func parseIfHeader(httpHeader string) (h ifHeader, ok bool) {
 	s := strings.TrimSpace(httpHeader)
 	switch tokenType, _, _ := lex(s); tokenType {

vendor/golang.org/x/net/webdav/webdav.go

@@ -267,6 +267,9 @@ func (h *Handler) handlePut(w http.ResponseWriter, r *http.Request) (status int,
 
 	f, err := h.FileSystem.OpenFile(ctx, reqPath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0666)
 	if err != nil {
+		if os.IsNotExist(err) {
+			return http.StatusConflict, err
+		}
 		return http.StatusNotFound, err
 	}
 	_, copyErr := io.Copy(f, r.Body)