commit ae0ca345b9974092bf139409d2852fc46886c250
Author: Stefan Schmidt <stefan.schmidt@otto.de>
Date:   Tue Feb 16 11:56:10 2021 +0100

    Fix autoconf error in version 2.70

diff --git a/configure.ac b/configure.ac
index 0596d45..5b73eb4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,7 +29,7 @@ AC_ARG_WITH([rst2man],
 		[--with-rst2man=PATH],
 		[Location of rst2man (auto)]),
 	[RST2MAN="$withval"],
-	AC_CHECK_PROGS(RST2MAN, [rst2man rst2man.py], []))
+	[AC_CHECK_PROGS(RST2MAN, [rst2man rst2man.py], [])])
 
 m4_ifndef([VARNISH_PREREQ], AC_MSG_ERROR([Need varnish.m4 -- see INSTALL.rst]))