bug#26916: doc: Suggest using `guix download` instead of curl

[Leo Famulari <leo@famulari.name>]

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A minor fix! I think it's better to suggest using `guix download` over
`curl` as a network connectivity test, since `guix download` will always
be available, while curl usually must installed.

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From 27211ce5b121ca45d9bc1e6dfd0ecba4abffa25c Mon Sep 17 00:00:00 2001
From: Leo Famulari <leo@famulari.name>
Date: Sat, 13 May 2017 20:47:09 -0400
Subject: [PATCH] doc: Suggest a network test command that will definitely be
 available.

* doc/guix.texi (Running GuixSD in a VM): Suggest the use of `guix
download` to test network connectivity.
---
 doc/guix.texi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 5227ad4ba..873fcf7b7 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -15679,7 +15679,7 @@ to your system definition and start the VM using
 @command{`guix system vm config.scm` -net user}.  An important caveat of using
 @command{-net user} for networking is that @command{ping} will not work, because
 it uses the ICMP protocol.  You'll have to use a different command to check for
-network connectivity, like for example @command{curl}.
+network connectivity, for example @command{guix download}.
 
 @subsubsection Connecting Through SSH
 
-- 
2.13.0


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