* [stable-2.8] Whitelist listen as a valid keyword on TaskInclude (#56586)
* Whitelist listen as a valid keyword on TaskInclude. Fixes#56580
* Move 'listen' to HandlerTaskInclude
* Remove trailing newline
(cherry picked from commit 576593e)
Co-authored-by: Matt Martz <matt@sivel.net>
* Improvement on setting VALID_INCLUDE_KEYWORDS on HandlerTaskInclude (#56801)
(cherry picked from commit 8bb3274711)