fix segfault in resolver: ngx_resolve_name_done() and ngx_resolve_addr_done() did not delete contexts from a resolver node waiting list.
fix segfault in resolver:
ngx_resolve_name_done() and ngx_resolve_addr_done() did not delete
contexts from a resolver node waiting list.

firebase/nginx,hy0kl/nginx,hy0kl/nginx,hy0kl/nginx,firebase/nginx,firebase/nginx,firebase/nginx