etc/nginx readme: add manjaro other than php

etc/nginx/README.md

@@ -1,2 +1,14 @@
 Useful nginx files that I will probably need and which I will forget if I
 cannot read them from here.
+
+## Manjaro
+
+Remove the default server block and add to http block:
+
+```
+include /etc/nginx/conf.d/*.conf;
+include /etc/nginx/sites-enabled/*;
+```
+
+PHP: todo. It has something to do with `php-fpm.sock` instead of
+`php5-fpm.sock`, but that doesn't appear to be enough.