Bugfix: changed a reference from vtsn->stat_upstream.rtms to vtscf->vtsn_upstream->stat_upstream.rtms. It is referred to as non-existent reference after kept a reference.
Bugfix: changed a reference from vtsn->stat_upstream.rtms to vtscf->vtsn_upstream->stat_upstream.rtms. It is referred to as non-existent reference after kept a reference.

whatvn/nginx-module-vts,wandenberg/nginx-module-vts,radut/nginx-module-vts,wandenberg/nginx-module-vts,vozlt/nginx-module-vts,radut/nginx-module-vts,whatvn/nginx-module-vts,vozlt/nginx-module-vts,whatvn/nginx-module-vts,radut/nginx-module-vts,vozlt/nginx-module-vts,whatvn/nginx-module-vts,wandenberg/nginx-module-vts,wandenberg/nginx-module-vts,radut/nginx-module-vts,vozlt/nginx-module-vts