[master] 9a23bd5e6 Revert 57c1d53e for now

[Federico G. Schwindt]

commit 9a23bd5e661b55ea504cc5c2fcdf4d17e0f4b1f0
Author: Federico G. Schwindt <fgsch at lodoss.net>
Date:   Tue Jul 3 20:56:37 2018 +0100

    Revert 57c1d53e for now
    
    For some strange reason this is failing with 3.6 in travis.

diff --git a/varnish.m4 b/varnish.m4
index f052aa145..8a92d5f10 100644
--- a/varnish.m4
+++ b/varnish.m4
@@ -130,12 +130,10 @@ AC_DEFUN([_VARNISH_CHECK_DEVEL], [
 # ---------------------
 AC_DEFUN([_VARNISH_CHECK_PYTHON], [
 
-	AC_PATH_PROGS(PYTHON, [python3.7 python3.6 python3.5 python3.4 python2.7 python3 python2 python], [
-		AC_MSG_ERROR([no suitable Python interpreter found])
-	])
-	AM_PYTHON_CHECK_VERSION([$PYTHON], [2.7], [], [
+	AM_PATH_PYTHON([2.7], [], [
 		AC_MSG_ERROR([Python >= 2.7 is required.])
 	])
+
 ])
 
 # _VARNISH_VMOD_LDFLAGS