[mythtv-users] Enable shutdown option on backends (other than master)

[Chad]

> $SOURCEDIR/mythtv/programs/mythfrontend/main.cpp
>
> Quick and dirty way to find this in 2 seconds:
>
> $ grep -r -A 5 -B 5 "Do you really want to exit MythTV?"
> $SOURCEDIR/mythtv/programs/
>
> Nick

Excellent, thank you!

-Chad