[PATCH] documentation: add git transport security notice

The fact that the git transport does not do any authentication is
easily overlooked.  For example, DNS poisoning may result in
fetching from somewhere that was not intended.

Add a brief security notice to the "GIT URLS" section
of the documentation stating that the git transport should be used
with caution on unsecured networks.

Signed-off-by: Fraser Tweedale <redacted>
---
 Documentation/urls.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/urls.txt b/Documentation/urls.txt
index 3ca122f..b58a647 100644
--- a/Documentation/urls.txt
+++ b/Documentation/urls.txt

@@ -11,6 +11,9 @@ and ftps can be used for fetching and rsync can be used for fetching
 and pushing, but these are inefficient and deprecated; do not use
 them).
 
+The git transport does not do any authentication and should be used
+with caution on unsecured networks.
+
 The following syntaxes may be used with them:
 
 - ssh://{startsb}user@{endsb}host.xz{startsb}:port{endsb}/path/to/repo.git/

-- 
1.8.3.1