Moving File Manager higher in the directive list (#1199)

* Moving File Manager higher in the directive list

See hacdias/caddy-filemanager#35.

* gofmt

caddyhttp/httpserver/plugin.go

@@ -430,10 +430,10 @@ var directives = []string{
 	"proxy",
 	"fastcgi",
 	"websocket",
+	"filemanager", // github.com/hacdias/caddy-filemanager
 	"markdown",
 	"templates",
 	"browse",
-	"filemanager", // github.com/hacdias/caddy-filemanager
 	"hugo",      // github.com/hacdias/caddy-hugo
 	"mailout",   // github.com/SchumacherFM/mailout
 	"awslambda", // github.com/coopernurse/caddy-awslambda