Merge branch 'ft/doc-git-transport' into maint

* ft/doc-git-transport:
documentation: add git:// transport security notice

diff --combined Documentation/urls.txt
index 60ba30011773804a04d5236a4917382615120cfe,5992ede1d8838cc30f26855702925df32004ffc6..64dae20b00fffc3acb0866a6c96d27f89ae2af23
--- 1/Documentation/urls.txt
--- 2/Documentation/urls.txt
+++ b/Documentation/urls.txt
@@@ -11,6 -11,9 +11,9 @@@ and ftps can be used for fetching and r
  and pushing, but these are inefficient and deprecated; do not use
  them).
  
+ The native transport (i.e. git:// URL) does no 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/
@@@ -33,7 -36,7 +36,7 @@@ For local repositories, also supported 
  syntaxes may be used:
  
  - /path/to/repo.git/
 -- file:///path/to/repo.git/
 +- \file:///path/to/repo.git/
  
  ifndef::git-clone[]
  These two syntaxes are mostly equivalent, except when cloning, when