Implement lingered closing

[asvetlov]

Reimplemented #1050

[codecov-io]

Current coverage is 98.85% (diff: 100%)

Merging #1478 into master will increase coverage by <.01%

@@             master      #1478   diff @@
==========================================
  Files            30         30          
  Lines          6972       6982    +10   
  Methods           0          0          
  Messages          0          0          
  Branches       1160       1162     +2   
==========================================
+ Hits           6892       6902    +10   
  Misses           40         40          
  Partials         40         40          

Powered by Codecov. Last update e8c732a...e77866b

[lock]

This thread has been automatically locked since there has not been
any recent activity after it was closed. Please open a new issue for
related bugs.

If you feel like there's important points made in this discussion,
please include those exceprts into that new issue.