Fix the signal command
Update the docs
Only send the stop signal to the parent
Add 'stop_children' option and fix send_signal_processes so that it sends to parent first and then all children

Previously, if a single child was already dead, the code would have given up
Allow 'stop_signal' and 'stop_children' for set command
real default value (as described everywhere)
add check_delay option
when check_delay < 0 (unit tests), there is no periodic callback "manage_watchers" any more
check_delay < 0 for tests (by default)
async rewrite of this test (to avoid problems with check_delay < 0)
check_delay < 0 by default
check_delay < 0 by default for tests
check_delay > 0 required here
Merge branch 'main_repo_master' into fix-signal-command
Add 'wid' to stats
Fix thread patch to be debugger friendly
Merge branch 'refs/heads/include-wid-in-stats' into fix-signal-command
Merge pull request #605 from thefab/fix599

Fix599
flake8-ed
async_poll_for and not poll_for inside a @gentest test