Update

syntax/modules/upstream-jdomain.vim

@@ -0,0 +1,8 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'nginx') == -1
+  
+" Upstream Domain Resolve Module <https://www.nginx.com/resources/wiki/modules/domain_resolve/>
+" A load-balancer that resolves an upstream domain name asynchronously.
+syn keyword ngxDirectiveThirdParty jdomain 
+
+
+endif