bitbake: doc: bitbake-user-manual: specify the URL to be used with SSH over git is different from git clone's

The URL expected by git fetcher when the SSH protocol is used differs
from the one given by Git servers to be used with the `git clone`
command.

Add a note making this specificity known to users.

Cc: Quentin Schulz <foss+yocto@0leil.net>
(Bitbake rev: 81c09d434aed13fcfc4ba426ae6a0b849447eb5f)

Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/doc/bitbake-user-manual/bitbake-user-manual-fetching.rst

@@ -396,6 +396,19 @@ This fetcher supports the following parameters:
    protocol is "file". You can also use "http", "https", "ssh" and
    "rsync".
 
+   .. note::
+
+     When ``protocol`` is "ssh", the URL expected in :term:`SRC_URI` differs
+     from the one that is typically passed to ``git clone`` command and provided
+     by the Git server to fetch from. For example, the URL returned by GitLab
+     server for ``mesa`` when cloning over SSH is
+     ``git@gitlab.freedesktop.org:mesa/mesa.git``, however the expected URL in
+     :term:`SRC_URI` is the following::
+
+       SRC_URI = "git://git@gitlab.freedesktop.org/mesa/mesa.git;protocol=ssh;..."
+
+     Note the ``:`` character changed for a ``/`` before the path to the project.
+
 -  *"nocheckout":* Tells the fetcher to not checkout source code when
    unpacking when set to "1". Set this option for the URL where there is
    a custom routine to checkout code. The default is "0".
@@ -446,6 +459,7 @@ Here are some example URLs::
 
    SRC_URI = "git://git.oe.handhelds.org/git/vip.git;tag=version-1"
    SRC_URI = "git://git.oe.handhelds.org/git/vip.git;protocol=http"
+   SRC_URI = "git://git@gitlab.freedesktop.org/mesa/mesa.git;protocol=ssh;..."
 
 .. note::