an excess was logged as 0.000 if requests were limited without delay:

an excess was logged as 0.000 if requests were limited without delay:

*) use a real excess value instead of non-updated limit_req rbtree node field,
*) move inactivity queue handling inside ngx_http_limit_req_lookup()
   since the node is not required outside the lookup function;

the bug has been introduced in r3184