Make NoVerifySSLCert work for all LLURLRequest

Moved CURLOPT_ENCODING from CurlEasyRequest::setPost_raw, and
CURLOPT_SSL_VERIFYPEER and CURLOPT_SSL_VERIFYHOST from
CurlResponderBuffer::prepRequest, to LLURLRequest::configure,
enabling the debug setting NoVerifySSLCert for the latter
two to work as follows: old behavior if "NoVerifySSLCert"
is not set, and check neither if it is set. However, if
the (new) bool mIsAuth is set the behavior of LLXMLRPCTransaction::Impl::init
is used. This is so in a next commit we can replace
LLXMLRPCTransaction with LLURLRequest: LLXMLRPCTransaction::Impl::init
will be removed. For the same reason, when the new boolean
mNoCompression is set then CURLOPT_ENCODING is set to "identity",
otherwise the old behavior (of clearing it) is used.

indra/llmessage/llhttpclient.cpp

@@ -149,7 +149,9 @@ static void request(
 	LLURLRequest::ERequestAction method,
 	Injector* body_injector,
 	LLCurl::ResponderPtr responder,
-	AIHTTPHeaders& headers)
+	AIHTTPHeaders& headers,
+	bool is_auth = false,
+	bool no_compression = false)
 {
 	if (responder)
 	{
@@ -160,7 +162,7 @@ static void request(
 	LLURLRequest* req;
 	try
 	{
-		req = new LLURLRequest(method, url, body_injector, responder, headers);
+		req = new LLURLRequest(method, url, body_injector, responder, headers, is_auth, no_compression);
 	}
 	catch(AICurlNoEasyHandle& error)
 	{