Adding new HP-Blob with user-management

seriously no ChangeLog from Patrick even it has been requested multiple times.

* improve function user behavior
* improve udev rules and filesystem permissions
iaccording to fstab(5) bump fs_passno for rw-parts
restart udev at begin of multi-user-mode

traces in single user mode shown that udev recognized all devices, but
didn't run every RUN command. Restarting udevd at begin of multi-user
mode seems to fix that behavior
move hp2sm to port 8081
fix incorrect use of setuidgid & improve xbmc user
tidy installation and ensure home dir permissions