set nginx_stash after reconfiguration in single interpreter perl

src/http/modules/perl/ngx_http_perl_module.c

diff --git a/src/http/modules/perl/ngx_http_perl_module.c b/src/http/modules/perl/ngx_http_perl_module.c
index bfdcb64..3006a07 100644
--- a/src/http/modules/perl/ngx_http_perl_module.c
+++ b/src/http/modules/perl/ngx_http_perl_module.c
@@ -466,6 +466,7 @@
         }
 
         pmcf->perl = perl;
+        pmcf->nginx = nginx_stash;
 
         return NGX_CONF_OK;
     }