use attributes for sysctl, as the resource/prodiver method is not persistent
add comments from the default yum-cron
change default notification email to "root"
use default value for SYSTEMNAME, should work fine
Merge pull request #165 from phunehehe/autoupdate

Tweak autoupdate defaults
Merge pull request #163 from phunehehe/supervisord

add new config options to supervisord
Merge pull request #164 from phunehehe/sysctl

Sysctl
add more program params for supervisord