Update sha1 for sshd-core 0.9.0-4-g5967cfd

Build was failing with the following error message:
expected 8f4b6f7ebc54655dc7d25a77665cf51f2b1288b2
received 449ec11c4417b295dbf1661585a50c6ec7d9a452

Change-Id: I77f442694eb403aff50de00ec826724fdb570e70
Set version to 2.9.3

Change-Id: I7e94c450e0bec68f4dff9c90321d007976faffab
Release notes for Gerrit 2.9.3

Change-Id: I26e586c0ba94a743ec02a6ac4a5ff1be9efb119b
Show link on hover for headings and anchors in documentation

For supporting users it is often useful to send them links to a
certain section in the documentation. The Gerrit documenation contains
a lot of anchors, but they are not easily accessible. If the section
is linked from the TOC the link to the section can be gained by
clicking on the link in the TOC. To link to other elements it is often
needed to check the HTML source code to find out the link target.

Make the links to section headings and anchors easier accessible by
displaying a link icon when the mouse is hovered over the heading or
anchor. By clicking on the link icon the page anchor is set and the
link can be copied from the address bar of the browser.

Having this functionality for anchors is especially useful for linking
to certain configuration parameters in the config-gerrit.html page.

The link icon is taken from the 'Freebie: Application Icon Set' [1]
which is licensed under the Creative Commons Attribution 3.0 Unported
License [2].

[1] http://tympanus.net/codrops/2012/10/02/freebie-application-icon-set-png-psd-csh/
[2] http://creativecommons.org/licenses/by/3.0/deed.en_US

Change-Id: I4377ea23ad76143fd4caa78afc30b82690e533ff
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
(cherry picked from commit a92861fb0126238014fc603257da65748efb05ca)
Merge branch 'stable-2.9' into stable-2.10

* stable-2.9:
  Release notes for Gerrit 2.9.3
  Set version to 2.9.3
  Update sha1 for sshd-core 0.9.0-4-g5967cfd

Conflicts:
	VERSION
	gerrit-extension-api/pom.xml
	gerrit-plugin-api/pom.xml
	gerrit-plugin-archetype/pom.xml
	gerrit-plugin-gwt-archetype/pom.xml
	gerrit-plugin-gwtui/pom.xml
	gerrit-plugin-js-archetype/pom.xml
	gerrit-war/pom.xml

Change-Id: I9243054c1ecf7539e39194886f5af4cf3565a389
Detecting Trivial Rebases fails unnecessarily early

When label.Label-Name.copyAllScoresOnTrivialRebase
is enabled, the detection of Trivial Rebases fails
unnecessarily early if useContentMerge is disabled
in the project settings.

According to the code comments, a Rebase is Trivial
if the Old PatchSet, cherry picked ontop of Parent
of the New PS, yields the exact same tree as the
New PS.

There is no reason to fail this detection due to
a path conflict regardless of the circumstances.
A Trivial Rebase is always a Trivial Rebase if the
code delta is unchanged.

This fix makes the Trivial Rebase detection ignore
the useContentMerge settings.

Change-Id: I7ef9bda0db3acce0d19bc6888084e57e55cb4b32
(cherry picked from commit dd4c0fb16d66bb010ef97d9f12487f350e08595f)
Remove now unused project parameter

Change I7ef9bda0db3acce0d19bc6888084e57e55cb4b32 removed the usage of the
project parameter.

Change-Id: I14857e0cb92662b1233bc3351d3367a73fceed0b