fix(nginx): Make filename always traceback to the index.lua call

rockspecs/remy-0.2.14-1.rockspec

@@ -0,0 +1,28 @@
+package = "remy"
+version = "0.2.14-1"
+source = {
+   url = "git://github.com/sailorproject/remy",
+   tag = "v0.2.14-alpha"
+}
+description = {
+   summary = "An abstraction of web servers supporting Lua",
+   detailed = [[
+      Remy (the R emulator) is a simple mod_lua emulator, allowing to run web applications built for mod_lua in alternative environments that allow to run server-side Lua code
+   ]],
+   license = "MIT"
+}
+dependencies = { 
+}
+build = {
+   type = "builtin",
+   modules = {
+      remy = "src/remy.lua",
+      ['remy.cgilua'] = "src/remy/cgilua.lua",
+      ['remy.mod_magnet'] = "src/remy/mod_magnet.lua",
+      ['remy.mod_plua'] = "src/remy/mod_plua.lua",
+      ['remy.nginx'] = "src/remy/nginx.lua",
+      ['remy.lwan'] = "src/remy/lwan.lua",
+      ['remy.nginx'] = "src/remy/nginx.lua",
+      ['remy.file_obj'] = "src/remy/file_obj.lua",
+   }
+}

src/remy/nginx.lua

@@ -146,7 +146,7 @@ local M = {
 
 function M.init()
 	local r = request
-	local filename = ngx.var.request_filename
+	local filename = debug.getinfo(4).source
 	local uri = ngx.var.uri
 	apache2.version = M.mode.."/"..ngx.var.nginx_version
 	r = remy.loadrequestrec(r)