Merge pull request #1 from arnoudj/mychanges

Netcat package in Debian/Ubuntu is called netcat, not nc.
Fix syntax in Modulefile
Use a pxc-bootstrap option with percona

Percona's init scripts do not support arguments,
but the percona packages include a bootstrap script
that can be used in its place. This patch uses that
script for the bootstrapping Exec resource when the
percona vendor is used.
Replaced clustercheck with improved version from Olaf van Zandwijk