update readme and alignment for code style

Author: xiaokai-wang

README.md

@@ -47,7 +47,7 @@ http {
 
         # all backend server will pull from consul when startup and will delete fake server
         upsync 127.0.0.1:8500/v1/kv/upstreams/test upsync_timeout=6m upsync_interval=500ms upsync_type=consul strong_dependency=off;
-        upsync_dump_path /usr/local/nginx/conf/upstreams/upstream_test.conf;
+        upsync_dump_path /usr/local/nginx/conf/servers/servers_test.conf;
     }
 
     upstream bar {

src/ngx_http_upsync_module.c

@@ -438,7 +438,7 @@ ngx_http_upsync_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
     }
     if (upscf->upsync_type_conf == NGX_CONF_UNSET_PTR) {
          ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                  "upsync_server: upsync_type cannt be null");
+                            "upsync_server: upsync_type cannt be null");
           goto invalid;
     }