Detect system time jumps
    
    In case if system time was changed backward it's possible to have ip
    address dropped by the kernel due to lifetime expirity. Try to detect
    this situation using either monotonic time or saved timestamp and execute
    go_reboot() procedure to request lease extention
    
    Part of fix resides in dhcp, part in bind-export-libs. Only in case of
    f29 and f30.
    
    Renamed from 0023-Detect-system-time-jumps.patch on master.