bitbake: bitbake-user-manual: Added "usehead" parameter.

(Bitbake rev: 17fb5216c9a5b5d4305bef6dcb267345040280c6)

(From poky rev: a4c7d286883db186f17d4044a6531eac88473403)

Change-Id: I4f2662d7d1a54762ed559134323ab3dc13f4b372
Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/poky/bitbake/doc/bitbake-user-manual/bitbake-user-manual-fetching.xml b/poky/bitbake/doc/bitbake-user-manual/bitbake-user-manual-fetching.xml
index 29ae486..92b2c3d 100644
--- a/poky/bitbake/doc/bitbake-user-manual/bitbake-user-manual-fetching.xml
+++ b/poky/bitbake/doc/bitbake-user-manual/bitbake-user-manual-fetching.xml
@@ -588,6 +588,14 @@
                         The name of the path in which to place the checkout.
                         By default, the path is <filename>git/</filename>.
                         </para></listitem>
+                    <listitem><para><emphasis>"usehead":</emphasis>
+                        Enables local <filename>git://</filename> URLs to use the
+                        current branch HEAD as the revision for use with
+                        <filename>AUTOREV</filename>.
+                        The "usehead" parameter implies no branch and only works
+                        when the transfer protocol is
+                        <filename>file://</filename>.
+                        </para></listitem>
                 </itemizedlist>
                 Here are some example URLs:
                 <literallayout class='monospaced'>