Adds support for persistence settings.
Bumps package version for new init script.

Signed-off-by: Karl Palsson <karlp@etactica.com>

This should always have been available in the mosquitto package itself.
This file needs to exist in basic form to allow the init scripts to even check whether it exists.

Signed-off-by: Karl Palsson <karlp@etactica.com>

Instead of manually copying files and renaming on install, use the nice
clean "files/<mirror>" structure and just $(CP) them into place.

Signed-off-by: Karl Palsson <karlp@etactica.com>