Revert "virtlockd: treat SIGHUP like SIGUSR1"
    
    This reverts commit 8355d42dd3df514c8584e0e5082b945b79671fc5.
    
    After some discussion upstream [1] this patch turns out to be spurious.
    It better gets reverted prior to a release.
    
    1: https://www.redhat.com/archives/libvir-list/2013-December/msg00563.html
    
    Signed-off-by: Michal Privoznik <mprivozn@redhat.com>