adding verifyMode param to safeRequest

[miki725]

docker in some cases needs to make a call via TLS however not validate the certificate

[ee7]

The new getSSLContext parameter is unused, so the CVerifyPeer mode is always used even if the caller tries to use a different mode. This PR writes:

context = getSSLContext(caFile = pinnedCert, verifyMode = verifyMode)

but then it only uses the CVerifyPeer mode because that's hardcoded inside getSSLContext.

[ee7]

This PR added verifyMode as a new parameter for createHttpClient, but did not alter newAwsClient proc, which uses createHttpClient:

nimutils/nimutils/awsclient.nim

Lines 95 to 105 in 4304936

	proc newAwsClient*(creds: AwsCredentials, region,
	service: string): AwsClient =
	let
	# TODO - use some kind of template and compile-time variable to put the correct kernel used to build the sdk in the UA?
	httpclient = createHttpClient(
	userAgent = "nimaws-sdk/0.3.3; " & defUserAgent.replace(" ", "-").toLower() & "; darwin/16.7.0",
	)
	scope = AwsScope(date: getAmzDateString(), region: region, service: service)
	return AwsClient(httpClient: httpclient, credentials: creds, scope: scope,
	key: "", key_expires: getTime())

Should we add a verifyMode parameter to newAwsClient?

Resolved.

[miki725]

aws client always needs to verify its peer. no need to customize it