It appears the Windows won't allow rename()ing a file over top

of an existing one.

src/syncterm/webget.c

@@ -1106,6 +1106,11 @@ do_request(struct http_session *sess)
 			goto error_return;
 		fclose(newfile);
 		newfile = NULL;
+		if (remove(path)) {
+			set_msgf(sess->req, "remove(\"%s\") error", path);
+			goto error_return;
+		}
+
 		if (rename(npath, path) != 0) {
 			set_msg(sess->req, "rename(npath, path) error");
 			goto error_return;