Also use the VCL_PROBE type where it makes sense

Refs c9d3b3ff

bin/varnishd/cache/cache_vrt_vcl.c

@@ -262,7 +262,7 @@ VCL_Name(const struct vcl *vcl)
 	return (vcl->loaded_name);
 }
 
-const struct vrt_backend_probe *
+VCL_PROBE
 VCL_DefaultProbe(const struct vcl *vcl)
 {
 

include/vrt.h

@@ -303,7 +303,7 @@ struct vrt_backend {
 	VRT_BACKEND_FIELDS(const)
 	const struct suckaddr		*ipv4_suckaddr;
 	const struct suckaddr		*ipv6_suckaddr;
-	const struct vrt_backend_probe	*probe;
+	VCL_PROBE			probe;
 };
 
 #define VRT_BACKEND_PROBE_FIELDS(rigid)				\

lib/libvcc/generate.py

@@ -652,7 +652,7 @@ struct VCL_conf {
 
     unsigned            syntax;
     VCL_BACKEND             *default_director;
-    const struct vrt_backend_probe  *default_probe;
+    VCL_PROBE               default_probe;
     unsigned            nref;
     const struct vrt_ref        *ref;