Simplify manual ssh host key checking

Also:
- Add 'Port 29418' to gerrit.wikipedia.org ssh_config entry, to simplify
  usage for users.
- Add .gitreview config for gerrit

Change-Id: I8972112d2ec75922c0f653d14b4e0f63151c8066
diff --git a/.gitreview b/.gitreview
new file mode 100644
index 0000000..c329815
--- /dev/null
+++ b/.gitreview
@@ -0,0 +1,5 @@
+[gerrit]
+host=gerrit.wikimedia.org
+port=29418
+project=operations/debs/wmf-sre-laptop.git
+defaultbranch=master