Fix of issue 855 #12 second image.

This should fix 'Received 302 (Moved Temporarily) for responder
"AgentStateResponder" which has no followRedir().

Some responders want to deal with redirections themselves, I checked if
this (new, pathfinder related) responder wants that in viewer-release,
but it doesn't. Turning this on requires to also keep track of cookies,
so it's a bit slower and therefore left at the old default: to not let
curl follow redirections. Optionally we would turn it on by default and
explicitely off for those responders that want to deal with 302's
themselves and for those that really don't need it and are used most
heavily.

indra/newview/llpathfindingmanager.cpp

@@ -165,6 +165,7 @@ public:
 
 	/*virtual*/ void result(const LLSD &pContent);
 	/*virtual*/ void error(U32 pStatus, const std::string& pReason);
+	/*virtual*/ bool followRedir(void) const { return true; }
 	/*virtual*/ AIHTTPTimeoutPolicy const& getHTTPTimeoutPolicy(void) const { return agentStateResponder_timeout; }
 	/*virtual*/ char const* getName(void) const { return "AgentStateResponder"; }