[FileBackend] Improved some header related docs.

Change-Id: I823af49b39afedda51f8192cd6a1a7467a8b78a7

diff --git a/includes/filebackend/FileBackend.php b/includes/filebackend/FileBackend.php
index 0b7c072..65caf10 100644 (file)
--- a/includes/filebackend/FileBackend.php
+++ b/includes/filebackend/FileBackend.php
@@ -514,9 +514,9 @@ abstract class FileBackend {
         *                           header when GETs/HEADs of the destination file are made.
         *                           Backends that don't support file metadata will ignore this.
         *                           See http://tools.ietf.org/html/rfc6266 (since 1.20).
-        *   - headers             : If supplied, the backend will return these headers when
-        *                           GETs/HEADs of the destination file are made. Header values
-        *                           should be smaller than 256 bytes, often options or numbers.
+        *   - headers             : If supplied with a header name/value map, the backend will
+        *                           reply with these headers when GETs/HEADs of the destination
+        *                           file are made. Header values should be smaller than 256 bytes.
         *                           Existing headers will remain, but these will replace any
         *                           conflicting previous headers, and headers will be removed
         *                           if they are set to an empty string.