change default for $label and add test for empty string
change default for $label and add test for empty string
racing-tech/rrp-raspi-installer,daytonpid/FireHawk,yodaaut/raspbian-ua-netinst,matt2005/raspbian-ua-netinst,firepick/FireHawk,beylsp/rpi-installer,racing-tech/rrp-raspi-installer,beylsp/rpi-installer,cybercircuits/raspbian-ua-netinst,malsony/raspbian-ua-netinst,dicer/raspbian-ua-netinst,FooDeas/raspberrypi-ua-netinst,kolargol/raspbian-ua-netinst