avoid TRUST_ME in shard director

lib/libvmod_directors/shard_cfg.c

@@ -293,8 +293,8 @@ shardcfg_hashcircle(struct sharddir *shardd, VCL_INT replicas)
 static void
 shardcfg_backend_free(struct shard_backend *f)
 {
-	if (f->ident)
-		free (TRUST_ME(f->ident));
+	if (f->freeptr)
+		free (f->freeptr);
 	memset(f, 0, sizeof(*f));
 }
 

lib/libvmod_directors/shard_dir.h

@@ -57,7 +57,10 @@ struct shard_circlepoint {
 
 struct shard_backend {
 	VCL_BACKEND		backend;
-	const char		*ident;	// XXX COPY IN !
+	union {
+		const char	*ident;
+		void		*freeptr;
+	};
 	VCL_DURATION		rampup;
 	uint32_t		canon_point;
 };