configure.ac: add "tar-ustar" to AM_INIT_AUTOMAKE.

The default tar format sucks, and ustar is my pick for the best
alternative based on Michał's article,

  https://dev.gentoo.org/~mgorny/articles/portability-of-tar-features.html

diff --git a/configure.ac b/configure.ac
index 6aeafec93e400e820cd40ebdef5b4ff9db6ff6a7..2970bc50a78c959735397ce7cafb6bad1ee692eb 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 AC_PREREQ([2.68])
 AC_INIT([apply-default-acl], [0.4.2], [michael@orlitzky.com])
-AM_INIT_AUTOMAKE([-Wall foreign no-dist-gzip dist-xz])
+AM_INIT_AUTOMAKE([-Wall foreign no-dist-gzip dist-xz tar-ustar])
 AC_CONFIG_FILES([Makefile src/Makefile])
 AC_CONFIG_SRCDIR([src/apply-default-acl.c])
 AC_CONFIG_MACRO_DIRS([m4])