Doc: Mention fb_multi in the release notes

diff --git a/ucw/doc/relnotes.txt b/ucw/doc/relnotes.txt
index 7d726dd5ab212f1212422c35a752c89c8d198dac..a720fb595724bb3cd995de8ddb3d581290600af7 100644 (file)
--- a/ucw/doc/relnotes.txt
+++ b/ucw/doc/relnotes.txt
@@ -23,6 +23,8 @@ WIP
   compiled by default.
 * <<signal:,Signal helpers>> for translation between signal names and numbers
   have been added.
+* The fastbuf I/O layer received a new back-end <<fastbuf:fbmulti,fb_multi>>,
+  which concatenates several fastbuf streams to form a single virtual stream.
 
 5.0
 ---