[cwctl] stop playing tricks with std{out,err} buffering
Python3 doesn't allow unbuffered text I/O, because it doesn't make
sense.
Document: cubicweb-doc
Title: CubicWeb documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/cubicweb-documentation/index.html
Files: /usr/share/doc/cubicweb-documentation/*.html