* made custom headers be available to async aws signer Signed-off-by: Bruno Murino <[email protected]> * updated changelog Signed-off-by: Bruno Murino <[email protected]> * added tests for using host header for AWS request signature on both sync and async clients Signed-off-by: Bruno Murino <[email protected]> * added documentation guide about aws auth when accessing via tunnel Signed-off-by: Bruno Murino <[email protected]> --------- Signed-off-by: Bruno Murino <[email protected]>