Sort vip primitives when creating haproxy group

Without the sort, the order of the VIP can change, and we keep updating
the haproxy group every now and then.
Import authkey as attribute if file already existed

On the founder node, when we generate the authkey, we actually only
import the authkey as an attribute if we create the authkey file. But if
the authkey file already exists, we don't do anything.

The result is that non-founder nodes are stuck because they don't have
access to the authkey.

This can happen after deactivating a pacemaker proposal, if the
attributes have been removed by the user, and then reactivating it.
Tell pacemaker to start apache with -DSSL when apache needs SSL

This is really a workaround for a bug in SLE HAE:
  https://bugzilla.novell.com/show_bug.cgi?id=890209

The apache RA doesn't read /etc/sysconfig/apache2 to find out if -DSSL
should be used, so we have to do it ourselves.

https://bugzilla.novell.com/show_bug.cgi?id=889570
Merge pull request #138 from vuntz/apache-ssl

Tell pacemaker to start apache with -DSSL when apache needs SSL
Merge pull request #134 from vuntz/stable-haproxy-group

Sort vip primitives when creating haproxy group
Merge pull request #137 from vuntz/import-authkey

Import authkey as attribute if file already existed