uinput keyboard handler now requires net_bt_stack group

[teleshoes]

/dev/uinput device is owned by the group net_bt_stack
running lipstick2vnc as non-root user with --keyboard-handler will result in the keyboard device not loading.

workaround: append net_bt_stack group to user defaultuser/nemo
usermod -G net_bt_stack nemo

(or chown system.privileged /dev/uinput at boot or on the fly since SGID bit is set)