Changes to scsi_id to support the udev %N and %p substitutions:
- Update version from .7 to .8
- change TMP_DIR back to /tmp
- if DEVPATH is set assume hotplug_mode (use syslog for logging, and does
not output some warnings)
- Always output a newline after the id is printed
- Allow command line options to override settings when hotplug_mode is set
- update man page
- update generator script to use the %N and %p substitutions.