Add deinitialization for upstreams

src/libserver/cfg_utils.c

@@ -229,6 +229,7 @@ rspamd_config_free (struct rspamd_config *cfg)
 	g_list_free (cfg->metrics_list);
 	rspamd_symbols_cache_destroy (cfg->cache);
 	REF_RELEASE (cfg->libs_ctx);
+	rspamd_upstreams_library_unref (cfg->ups_ctx);
 	rspamd_mempool_delete (cfg->cfg_pool);
 	lua_close (cfg->lua_state);
 	g_slice_free1 (sizeof (*cfg), cfg);

src/libutil/upstream.c

@@ -139,6 +139,12 @@ rspamd_upstream_ctx_dtor (struct upstream_ctx *ctx)
 	g_slice_free1 (sizeof (*ctx), ctx);
 }
 
+void
+rspamd_upstreams_library_unref (struct upstream_ctx *ctx)
+{
+	REF_RELEASE (ctx);
+}
+
 struct upstream_ctx *
 rspamd_upstreams_library_init (void)
 {

src/libutil/upstream.h

@@ -27,6 +27,11 @@ struct upstream_ctx;
  */
 struct upstream_ctx* rspamd_upstreams_library_init (void);
 
+/**
+ * Remove reference from upstreams library
+ */
+void rspamd_upstreams_library_unref (struct upstream_ctx *ctx);
+
 /**
  * Configure attributes of upstreams library
  * @param cfg