New http client#10

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JanVerstuyft wants to merge 4 commits intosmartrics:masterfrom

JanVerstuyft:new_http_client

Commits on Feb 9, 2022

new http client
Jan Verstuyft
committed

Commits on Feb 23, 2022

fix some issues with the body and the url.
Jan Verstuyft
committed

Commits on Mar 4, 2022

clean up some code. removed todo's
Jan Verstuyft
committed

Commits on Apr 12, 2022

only write response entity if it is not null.
Jan Verstuyft
committed