[PATCH for-4.15] tools/libxl: Document where the magic MAC numbers come from

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

Matches the comment in the xl-network-configuration manpage.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Ian Jackson <iwj@xxxxxxxxxxxxxx>
CC: Wei Liu <wl@xxxxxxx>
CC: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 tools/libs/light/libxl_nic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/libs/light/libxl_nic.c b/tools/libs/light/libxl_nic.c
index 144e9e23e1..0b45469dca 100644
--- a/tools/libs/light/libxl_nic.c
+++ b/tools/libs/light/libxl_nic.c
@@ -73,6 +73,7 @@ static int libxl__device_nic_setdefault(libxl__gc *gc, 
uint32_t domid,
         libxl_uuid_generate(&uuid);
         r = libxl_uuid_bytearray(&uuid);
 
+        /* Generate a random MAC address, with Xen's OUI (00:16:3e) */
         nic->mac[0] = 0x00;
         nic->mac[1] = 0x16;
         nic->mac[2] = 0x3e;
-- 
2.11.0