Make compatible with 6.0

configure.ac

@@ -28,7 +28,7 @@ AC_ARG_WITH([rst2man],
 
 m4_ifndef([VARNISH_PREREQ], AC_MSG_ERROR([Need varnish.m4 -- see README.rst]))
 
-VARNISH_PREREQ([5.2])
+VARNISH_PREREQ([6.0], [6.2])
 VARNISH_VMODS([example])
 
 VMOD_TESTS="$(cd $srcdir/src && echo tests/*.vtc)"

src/vmod_example.c

@@ -20,7 +20,7 @@ char	     *info;
  */
 
 int v_matchproto_(vmod_event_f)
-vmod_event_function(VRT_CTX, struct vmod_priv *priv, enum vcl_event_e e)
+event_function(VRT_CTX, struct vmod_priv *priv, enum vcl_event_e e)
 {
 	char	   ts[VTIM_FORMAT_SIZE];
 	const char *event = NULL;