adjust to vmod_priv methods

Ref:
https://github.com/varnishcache/varnish-cache/commit/681c11998ec56dc4460a30585210f95a7850ea3b

src/set.c

@@ -374,7 +374,7 @@ vmod_set_match(VRT_CTX, struct vmod_re2_set *set, VCL_STRING subject)
 			return 0;
 		}
 		priv->len = sizeof(*task);
-		priv->free = NULL;
+		AZ(priv->methods);
 		task = priv->priv;
 		task->magic = TASK_SET_MATCH_MAGIC;
 	}

src/vmod_re2.c

@@ -66,6 +66,13 @@ free_task_match(void *p)
 		vre2_fini(&task_match->vre2);
 }
 
+static const struct vmod_priv_methods match_priv_task_methods[1] = {{
+		.magic = VMOD_PRIV_METHODS_MAGIC,
+		.type = "vmod_re2_match_priv_task",
+		.fini = free_task_match
+}};
+
+
 #define ERR_PREFIX "match(\"%.40s\"): "
 
 static VCL_BOOL
@@ -315,7 +322,7 @@ vmod_regex_match(const struct vrt_ctx *ctx, struct vmod_re2_regex *re,
 			return 0;
 		}
 		task->len = sizeof(*task_match);
-		task->free = NULL;
+		AZ(task->methods);
 		task_match = (task_match_t *)task->priv;
 		task_match->magic = TASK_MATCH_MAGIC;
 	}
@@ -553,7 +560,7 @@ vmod_match(VRT_CTX, struct vmod_priv *priv, VCL_STRING pattern,
 		}
 		priv->priv = task_match;
 		priv->len = sizeof(*task_match);
-		priv->free = free_task_match;
+		priv->methods = match_priv_task_methods;
 		task_match->magic = TASK_MATCH_MAGIC;
 	}
 	else {