[Tarantool-patches] [PATCH 13/13] popen: add caution comment for popen_may_io()

[Cyrill Gorcunov]

On Wed, Apr 15, 2020 at 07:25:50AM +0300, Alexander Turenko wrote:
> It was easy to misinterpret popen_may_io() contract. In fact, I made
> this mistake recently and want to clarify how the function should be
> called.
> 
> Part of #4031

Ack