MAINT-4564 HTTP Pipelining is not happening in Drano HTTP Phase 4

Incorporate the new libcurl 7.38.0 build with curl bug 1420
workaround.  Add developer-centric testing code to evaluate
the workaround or a future fix for 1420.

autobuild.xml

@@ -282,9 +282,9 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>ed283b163e8f74d2c9d6ea5874fcca54</string>
+              <string>40b1c6b3727ebedafc2f1a172797ccd1</string>
               <key>url</key>
-              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/hg/repo/3pl_3p-curl-update/rev/294562/arch/Darwin/installer/curl-7.38.0-darwin-20140923.tar.bz2</string>
+              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/hg/repo/3pl_3p-curl-update/rev/295367/arch/Darwin/installer/curl-7.38.0-darwin-20141010.tar.bz2</string>
             </map>
             <key>name</key>
             <string>darwin</string>
@@ -294,9 +294,9 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>6a0a62b6c026fa0b33c0978f4afd152e</string>
+              <string>06149da3d7a34adf40853f813ae55328</string>
               <key>url</key>
-              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/hg/repo/3pl_3p-curl-update/rev/294562/arch/Linux/installer/curl-7.38.0-linux-20140923.tar.bz2</string>
+              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/hg/repo/3pl_3p-curl-update/rev/295367/arch/Linux/installer/curl-7.38.0-linux-20141010.tar.bz2</string>
             </map>
             <key>name</key>
             <string>linux</string>
@@ -306,9 +306,9 @@
             <key>archive</key>
             <map>
               <key>hash</key>
-              <string>56ff4698d5b39a37994f4cc8acba19f0</string>
+              <string>e4280eae792a5f13bc9d01d8cfb7c557</string>
               <key>url</key>
-              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/hg/repo/3pl_3p-curl-update/rev/294562/arch/CYGWIN/installer/curl-7.38.0-windows-20140923.tar.bz2</string>
+              <string>http://automated-builds-secondlife-com.s3.amazonaws.com/hg/repo/3pl_3p-curl-update/rev/295367/arch/CYGWIN/installer/curl-7.38.0-windows-20141010.tar.bz2</string>
             </map>
             <key>name</key>
             <string>windows</string>

indra/llcorehttp/_httpoprequest.cpp

@@ -626,8 +626,8 @@ HttpStatus HttpOpRequest::prepareRequest(HttpService * service)
 		// *TODO:  Find a better scheme than timeouts to guarantee liveness.
 		xfer_timeout *= cpolicy.mPipelining;
 	}
-	// *DEBUG:  Useful for timeout handling and "[curl:bugs] #1420" tests
-	// xfer_timeout = 3L;
+	// *DEBUG:  Enable following override for timeout handling and "[curl:bugs] #1420" tests
+	// xfer_timeout = 1L;
 	code = curl_easy_setopt(mCurlHandle, CURLOPT_TIMEOUT, xfer_timeout);
 	check_curl_easy_code(code, CURLOPT_TIMEOUT);
 	code = curl_easy_setopt(mCurlHandle, CURLOPT_CONNECTTIMEOUT, timeout);

indra/llcorehttp/_httppolicy.cpp

@@ -414,6 +414,18 @@ bool HttpPolicy::stageAfterCompletion(HttpOpRequest * op)
 	// Retry or finalize
 	if (! op->mStatus)
 	{
+		// *DEBUG:  For "[curl:bugs] #1420" tests.  This will interfere
+		// with unit tests due to allocation retention by logging code.
+		// But you won't be checking this in enabled.
+#if 0
+		if (op->mStatus == HttpStatus(HttpStatus::EXT_CURL_EASY, CURLE_OPERATION_TIMEDOUT))
+		{
+			LL_WARNS(LOG_CORE) << "HTTP request " << static_cast<HttpHandle>(op)
+							   << " timed out."
+							   << LL_ENDL;
+		}
+#endif
+		
 		// If this failed, we might want to retry.
 		if (op->mPolicyRetries < op->mPolicyRetryLimit && op->mStatus.isRetryable())
 		{

indra/llcorehttp/httpcommon.cpp

@@ -254,8 +254,9 @@ bool HttpStatus::isRetryable() const
 			*this == op_timedout ||		// Timer expired
 			*this == post_error ||		// Transport problem
 			*this == partial_file ||	// Data inconsistency in response
-			*this == inv_cont_range ||	// Short data read disagrees with content-range
-			*this == inv_status);		// Inv status can reflect internal state problem in libcurl
+			// *DEBUG:  Comment out 'inv_status' test for [curl:bugs] #1420 testing.
+			*this == inv_status ||		// Inv status can reflect internal state problem in libcurl
+			*this == inv_cont_range);	// Short data read disagrees with content-range
 }
 
 } // end namespace LLCore