Use xl or xm
Merge pull request #1 from ml8mr/xlxm

Use xl or xm
xm or xl
Add detection for grub and systemd environments
Merge pull request #3 from ml8mr/getenv

Add detection for grub and systemd environments
Update xen to new grub and systemd config
xen systemd detection
Merge pull request #4 from ml8mr/xen-svc

Update xen to new grub and systemd config
new grub and systemd
Merge branch 'master' of https://github.com/g23guy/supportutils