gnu: docker: Add comment.

* gnu/packages/patches/docker-use-fewer-modprobes.patch: Add comment.

diff --git a/gnu/packages/patches/docker-use-fewer-modprobes.patch b/gnu/packages/patches/docker-use-fewer-modprobes.patch
index ebee833..742cd60 100644 (file)
--- a/gnu/packages/patches/docker-use-fewer-modprobes.patch
+++ b/gnu/packages/patches/docker-use-fewer-modprobes.patch
@@ -1,5 +1,8 @@
 This patch makes docker find out whether a filesystem type is supported
 by trying to mount a filesystem of that type rather than invoking "modprobe".
+
+See <https://github.com/moby/moby/pull/38930>.
+
 --- docker-18.09.0-checkout/daemon/graphdriver/overlay/overlay.go.orig 1970-01-01 01:00:00.000000000 +0100
 +++ docker-18.09.0-checkout/daemon/graphdriver/overlay/overlay.go      2019-03-19 09:16:03.487087490 +0100
 @@ -8,7 +8,6 @@