VBT -> VTP rename and avoid dependency on cache_tcp_pool.h for now

src/wadj_thread.c

@@ -51,6 +51,11 @@
 #include "waiter/waiter.h"
 #include "cache/cache_director.h"
 #include "cache/cache_backend.h"
+#ifdef FIXME
+#include "cache/cache_tcp_pool.h"
+#else
+int VTP_Open(const struct tcp_pool *, double tmo, const struct suckaddr **);
+#endif
 
 #include "vdir.h"
 
@@ -90,7 +95,7 @@ wadj_poke(const struct wadj_prop *prop, char *buf,
 	*buf = '\0';
 	*len = 0;
 
-	s = VBT_Open(prop->be->tcp_pool, t_end - t_now, &sa);
+	s = VTP_Open(prop->be->tcp_pool, t_end - t_now, &sa);
 
 	if (s < 0) {
 		POKE_ERR(prop, "no connection %s", strerror(errno));