release-20.3:Backport!4573

Merged Andrey Vertiprahov requested to merge cherry-pick-e1c14bcc into release-20.3

Add api_unlimited_row_limit param

See merge request !4573 (merged)

(cherry picked from commit e1c14bcc)

c6cb7d74 Add api_unlimited_row_limit param to extapplication limit query. 8aaf8bc5 Fix typo.

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