addresses #322. Will now check free space on the first file system output by 'df- lkP`, as opposed to `/` to make pi-hole more compatible with other distros.
whiptail --msgbox --backtitle "Insufficient Disk Space" --title "Insufficient Disk Space""\nYour system appears to be low on disk space. pi-hole recomends a minimum of $requiredFreeBytes Bytes.\nYou only have $existingFreeBytes Free.\n\nIf this is a new install you may need to expand your disk.\n\nTry running:\n 'sudo raspi-config'\nChoose the 'expand file system option'\n\nAfter rebooting, run this installation again.\n\ncurl -L install.pi-hole.net | bash\n"$r$c
whiptail --msgbox --backtitle "Insufficient Disk Space" --title "Insufficient Disk Space""\nYour system appears to be low on disk space. pi-hole recomends a minimum of $requiredFreeBytes Bytes.\nYou only have $existingFreeBytes Free.\n\nIf this is a new install you may need to expand your disk.\n\nTry running:\n 'sudo raspi-config'\nChoose the 'expand file system option'\n\nAfter rebooting, run this installation again.\n\ncurl -L install.pi-hole.net | bash\n"$r$c