HH-43096 copy as curl: use ": " instead of "=" as a delimeter for headers
Merge remote-tracking branch 'origin/HH-43096' into EXP-11202
release 2.19.10 [a.rybalkin@hh.ru]
HH-43336 new AsyncGroup.try_finish_async method
HH-42371 fix AsyncGroup implementation
HH-42371 fix docs and speed up unittests, fix PEP8
new debug with Jinja2
make logging more consistent
new stages, log request_time instead of app total time
improve tests
add tests for debug page
add coverage to tests run
improve frontik.testing
parse text/plain
ensure_ascii=False
drop python 2.6
add new tests
self.async_group