Update

syntax/modules/backtrace.vim

@@ -0,0 +1,9 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'nginx') == -1
+  
+" Backtrace module <https://github.com/alibaba/nginx-backtrace>
+" A Nginx module to dump backtrace when a worker process exits abnormally
+syn keyword ngxDirectiveThirdParty backtrace_log
+syn keyword ngxDirectiveThirdParty backtrace_max_stack_size
+
+
+endif