[PATCH] clarify network drive description

[Andrey Borzenkov <arvidjaar@gmail.com>]

Mention that network drives can include server address and that
necessary modules are not autoloaded and must be loaded manually. Also
cross-reference to net_default_server.

Signed-off-by: Andrey Borzenkov <arvidjaar@gmail.com>

---
 ChangeLog      | 5 +++++
 docs/grub.texi | 9 ++++++---
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 33d1265..d661157 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-05-09  Andrey Borzenkov <arvidjaar@gmail.com>
+
+	* docs/grub.texi (Device syntax): Clarify description of network
+	drives.
+
 2013-05-08  Andrey Borzenkov <arvidjaar@gmail.com>
 
 	* docs/grub.texi (Network): Add description of net_default_interface,
diff --git a/docs/grub.texi b/docs/grub.texi
index 70c0de8..95b74d8 100644
--- a/docs/grub.texi
+++ b/docs/grub.texi
@@ -2531,9 +2531,12 @@ of the partition when installing GRUB).
 (hd0,1,3)
 @end example
 
-If you enabled the network support, the special drives @samp{(tftp)},
-@samp{(http)} and so on ars also available.
-Before using the network drive, you must initialize the network.
+If you enabled the network support, the special drives
+@code{(@var{protocol}[,@var{server}])} are also available. Supported protocols
+are @samp{http} and @samp{tftp}. If @var{server} is omitted, value of
+environment variable @samp{net_default_server} is used.
+Note that necessary modules (@samp{http} and @samp{tftp}) have to be loaded
+manually. Before using the network drive, you must initialize the network.
 @xref{Network}, for more information.
 
 If you boot GRUB from a CD-ROM, @samp{(cd)} is available. @xref{Making
-- 
tg: (e33686c..) u/net_drive (depends on: master)