bootloader/inst: check if /sbin/init is the specified init's symlink.

This is a somewhat nice way to remove the now useless init= paramater from the
boot options while keeping it on stock Semplice 6 installations.
timezone/front/glade: use preferences-system-time as header_icon
modules/end/front: use face-smile as header_icon and main icon
6.2.0
live-config: linstalleralan: modify the vera alan2 profile in ~/.config/vera/alan