feat: Add support for CURL networking. #2509

Job	Run time
contract-tests	2m 50s
contract-tests-curl	2m 55s
build-test-client-windows	16m 1s
build-test-client-windows-curl	17m 3s
build-test	5m 28s
build-test-curl	5m 25s
build-test-client-mac	8m 55s
build-test-client-mac-curl	14m 5s
	1h 12m 42s

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