Always use followRedir() to determine if redirections should be followed.

Before every HEAD and GET request allowed redirection by default,
without setting a limit on the number of redirections. This caused
an infinite redirect loop when connecting to marketplace, in combination
with the bug that we did not allow cookies.

indra/newview/lltexturefetch.cpp

@@ -408,7 +408,7 @@ public:
 		}
 	}
 	
-	virtual bool followRedir()
+	/*virtual*/ bool followRedir() const
 	{
 		return mFollowRedir;
 	}