docs: A few minor changes

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

@@ -11,10 +11,11 @@ This directive is a special case: it is evaluated before the structure is parsed
 ## Syntax
 
 ```caddy-d
-import <pattern>
+import <pattern> [<args...>]
 ```
 
 - **&lt;pattern&gt;** is the filename, glob pattern, or name of [snippet](/docs/caddyfile/concepts#snippets) to include. Its contents will replace this line as if that file's contents appeared here to begin with. It is an error if a specific file cannot be found, but an empty glob pattern is not an error.
+- **&lt;args...&gt;** is an optional list of arguments to pass to the imported tokens. They can be used with a placeholder of the form `{args.N}` where `N` is the 0-based positional index of the parameter. This placeholder is a special case and is evaluated at parse-time, not run-time.
 
 
 ## Examples
@@ -24,3 +25,17 @@ Import all files in an adjacent sites-enabled folder:
 ```caddy-d
 import sites-enabled/*
 ```
+
+Import a snippet that sets CORS headers using an import argument:
+
+```caddy
+(cors) {
+	@origin header Origin {args.0}
+	header @origin Access-Control-Allow-Origin "{args.0}"
+	header @origin Access-Control-Request-Method GET
+}
+
+example.com {
+	import cors example.com
+}
+```