README.ci updates on Git mirroring

README.ci

 Continuous integration with Jenkins
------------------------------------
+===================================
+
+Preparing a GIT mirror
+----------------------
+
+Jenkins cannot currently work with Git over encrypted HTTP. To solve
+this problem we currently mirror the central Git repository locally
+on the jenkins installation machine. To setup such a mirror do the
+following:
+
+-edit .netrc
+
+machine code.grnet.gr
+login accountname
+password accountpasswd
+
+-Create the mirror
+
+git clone --mirror https://code.grnet.gr/git/synnefo synnefo
+
+-Setup cron to pull from the mirror periodically. Ideally, Git mirror updates
+should run just before Jenkins jobs check the mirror for changes.
+
+4,14,24,34,44,54 * * * * cd /path/to/mirror && git fetch && git remote prune origin
+
+Jenkins setup
+-------------
 
 The following instructions will setup Jenkins to run synnefo tests with
 the SQLite database. To run the tests on MySQL and/or Postgres, step 5
 must be replicated. Also, the correct configuration file must be copied
-(line 5 of the build script).
+(line 6 of the build script).
 
 1. Install and start Jenkins. On Debian Squeeze: