* lxd: Add lxc command execution debug statement.
* lxd: avoid false positives in "instance not found" detection
Due to changes over time in the error message which lxd printed when an
instance wasn't found, the detection logic in the lxd connection plugin
matched any "not found" string. Unfortunately this also false triggered
on other errors e.g. "/usr/bin/python3: not found" from the payload,
giving a confusing error message "UNREACHABLE! ... instance not found"
to the ansible user.
* Update changelog fragment.
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Co-authored-by: Felix Fontein <felix@fontein.de>
