While I understand that nginx's author probably wants the dir indexing module to be minimal, I guess it doesn't hurt to add these small features as optional directives
1. Enable or disable column header sorting (by name, last modified, size)
2. Display file size in 2 decimal places (eg 30.52 MB, 1.34 GB) when autoindex_exact_size is off
I realize there is 3rd party dir indexing module that does a lot more than nginx's AutoIndex but I just need these 2 extra features on top of nginx's AutoIndex