remove redis for sms queue
change radcheck and contact relationship
add query for voucher list
fix join between radcheck and contact
add hotspot view
disconnect by voucher
add remove voucher when removing session
add radius group as config
add message template for voucher sms
add radius group config view
add sub menu to hotspot
check for login_rquired
using easy to see characters for voucher generation
cleanup using session time from radius group attribute