new: file_server.sort (#407)

src/docs/markdown/caddyfile/directives/file_server.md

@@ -42,6 +42,7 @@ file_server [<matcher>] [browse] {
 	status        <status>
 	disable_canonical_uris
 	pass_thru
+	sort          <sort_field> [<direction>]
 }
 ```
 
@@ -61,6 +62,8 @@ file_server [<matcher>] [browse] {
 
   - **reveal_symlinks** <span id="reveal_symlinks"/> enables revealing the targets of symbolic links in directory listings. By default, the symlink targets are hidden, and only the link file itself is shown.
 
+  - **sort** <span id="sort"/> changes the default sort for directory listings. The first parameter is the field/column to sort by: `name`, `namedirfirst`, `size`, or `time`. The second argument is an optional direction: `asc` or `desc`. For example, `sort name desc` will sort by name in descending order.
+
 - **precompressed** <span id="precompressed"/> is the list of encoding formats to search for precompressed sidecar files. Arguments are an ordered list of encoding formats to search for precompressed [sidecar files](https://en.wikipedia.org/wiki/Sidecar_file). Supported formats are `gzip` (`.gz`), `zstd` (`.zst`) and `br` (`.br`).
 
   All file lookups will look for the existence of the uncompressed file first. Once found Caddy will look for sidecar files with the file extension of each enabled format. If a precompressed sidecar file is found, Caddy will respond with the precompressed file, with the `Content-Encoding` response header set appropriately. Otherwise, Caddy will respond with the uncompressed file as normal. If the [`encode` directive](encode) is enabled, then it may compress the response on-the-fly if not precompressed.
@@ -71,6 +74,7 @@ file_server [<matcher>] [browse] {
 
 - **pass_thru** <span id="pass_thru"/> enables pass-thru mode, which continues to the next HTTP handler in the route if the requested file is not found, instead of triggering a `404` error (invoking [`handle_errors`](handle_errors) routes). Practically, this is only useful inside of a [`route`](route) block with other handler directives following `file_server`, because this directive is effectively [ordered last](/docs/caddyfile/directives#directive-order).
 
+
 ## Examples
 
 A static file server out of the current directory: