feat: Add support for CURL networking. #2473

Job	Run time
contract-tests-curl	3m 19s
build-test	5m 56s
build-test-curl	5m 45s
contract-tests	5m 2s
build-test-client-mac-curl	11m 57s
build-test-client-mac	11m 49s
build-test-client-windows-curl	30m 35s
build-test-client-windows	17m 6s
contract-tests	2m 30s
build-test-client-mac-curl	11m 57s
build-test-client-windows	17m 6s
build-test-client-windows-curl	30m 35s
build-test-client-mac	11m 49s
build-test	5m 56s
build-test-curl	5m 45s
contract-tests-curl	3m 19s
	3h 0m 26s

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