On Tue Jul 11 15:06:25 2017, kunschikov@gmail.com wrote:
> Again can be easily checked by usage of `strace`.

=> hum, it seems your solution (change the gettimeofday
clock for a monotonic one) is the only one which does not
require some redesign/recode...
Two notes:
 - I have a tool for DNS which increases exponentially
  the clock speed. It is used to check re-signing & co.
  It is based on redirection of the gettimeofday system call
  in a very similar way...
 - unfortunately your solution won't work between reboots
  so you have to remove the client lease file to reset the
  state (this file is used at startup as an optimization and
  is not critical at all, BTW many clients have no stable
  storage so should not depend on it).