Add .gitreview config file for gerrit.

The CI team is developing a new tool, git-review:

https://github.com/openstack-ci/git-review

which is intendend to replace rfc.sh. This adds a .gitreview file
so that it can automatically determine the canonical gerrit location
for the repository when first run. Later, rfc.sh will be updated to
indicate it is deprecated, and then eventually removed.

Change-Id: I9f1be3e80aa40732ec500d329d31d3e880427a8a

.gitreview

@@ -0,0 +1,4 @@
+[gerrit]
+host=review.openstack.org
+port=29418
+project=openstack-dev/devstack.git

tools/rfc.sh

@@ -0,0 +1,145 @@
+#!/bin/sh -e
+# Copyright (c) 2010-2011 Gluster, Inc. <http://www.gluster.com> 
+# This initial version of this file was taken from the source tree
+# of GlusterFS. It was not directly attributed, but is assumed to be
+# Copyright (c) 2010-2011 Gluster, Inc and release GPLv3
+# Subsequent modifications are Copyright (c) 2011 OpenStack, LLC.
+#
+# GlusterFS is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published
+# by the Free Software Foundation; either version 3 of the License,
+# or (at your option) any later version.
+#
+# GlusterFS is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see
+# <http://www.gnu.org/licenses/>.
+
+
+branch="master";
+
+set_hooks_commit_msg()
+{
+    top_dir=`git rev-parse --show-toplevel`
+    f="${top_dir}/.git/hooks/commit-msg";
+    u="https://review.openstack.org/tools/hooks/commit-msg";
+
+    if [ -x "$f" ]; then
+        return;
+    fi
+
+    curl -o $f $u || wget -O $f $u;
+
+    chmod +x $f;
+
+    GIT_EDITOR=true git commit --amend
+}
+
+add_remote()
+{
+    username=$1
+    project=$2
+
+    echo "No remote set, testing ssh://$username@review.openstack.org:29418"
+    if project_list=`ssh -p29418 -o StrictHostKeyChecking=no $username@review.openstack.org gerrit ls-projects 2>/dev/null`
+    then
+        echo "$username@review.openstack.org:29418 worked."
+        if echo $project_list | grep $project >/dev/null
+        then
+            echo "Creating a git remote called gerrit that maps to:"
+            echo "  ssh://$username@review.openstack.org:29418/$project"
+            git remote add gerrit ssh://$username@review.openstack.org:29418/$project
+        else
+            echo "The current project name, $project, is not a known project."
+            echo "Please either reclone from github/gerrit or create a"
+            echo "remote named gerrit that points to the intended project."
+            return 1
+        fi
+
+        return 0
+    fi
+    return 1
+}
+
+check_remote()
+{
+    if ! git remote | grep gerrit >/dev/null 2>&1
+    then
+        origin_project=`git remote show origin | grep 'Fetch URL' | perl -nle '@fields = split(m|[:/]|); $len = $#fields; print $fields[$len-1], "/", $fields[$len];'`
+        if add_remote $USERNAME $origin_project
+        then
+            return 0
+        else
+            echo "Your local name doesn't work on Gerrit."
+            echo -n "Enter Gerrit username (same as launchpad): "
+            read gerrit_user
+            if add_remote $gerrit_user $origin_project
+            then
+                return 0
+            else
+                echo "Can't infer where gerrit is - please set a remote named"
+                echo "gerrit manually and then try again."
+                echo
+                echo "For more information, please see:"
+                echo "\thttp://wiki.openstack.org/GerritWorkflow"
+                exit 1
+            fi
+        fi
+    fi
+}
+
+rebase_changes()
+{
+    git fetch;
+
+    GIT_EDITOR=true git rebase -i origin/$branch || exit $?;
+}
+
+
+assert_diverge()
+{
+    if ! git diff origin/$branch..HEAD | grep -q .
+    then
+	echo "No changes between the current branch and origin/$branch."
+	exit 1
+    fi
+}
+
+
+main()
+{
+    set_hooks_commit_msg;
+
+    check_remote;
+
+    rebase_changes;
+
+    assert_diverge;
+
+    bug=$(git show --format='%s %b' | perl -nle 'if (/\b([Bb]ug|[Ll][Pp])\s*[#:]?\s*(\d+)/) {print "$2"; exit}')
+
+    bp=$(git show --format='%s %b' | perl -nle 'if (/\b([Bb]lue[Pp]rint|[Bb][Pp])\s*[#:]?\s*([0-9a-zA-Z-_]+)/) {print "$2"; exit}')
+
+    if [ "$DRY_RUN" = 1 ]; then
+        drier='echo -e Please use the following command to send your commits to review:\n\n'
+    else
+        drier=
+    fi
+
+    local_branch=`git branch | grep -Ei "\* (.*)" | cut -f2 -d' '`
+    if [ -z "$bug" ]; then
+	if [ -z "$bp" ]; then
+            $drier git push gerrit HEAD:refs/for/$branch/$local_branch;
+	else
+	    $drier git push gerrit HEAD:refs/for/$branch/bp/$bp;
+	fi
+    else
+        $drier git push gerrit HEAD:refs/for/$branch/bug/$bug;
+    fi
+}
+
+main "$@"