And Distinguish TAI/UTC
modify wr_mon to show that "Switch time" is UTC, "WR time" is TAI, and display
number of leap seconds

Was:
Switch time: 2017-03-11 23:30:08
WR time:     2017-03-11 23:30:46

No is:
WR time (TAI):     2017-03-11 23:30:46
Switch time (UTC): 2017-03-11 23:30:08
Leap seconds: 37
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>