Fixed select_driver(), cookie sess_destroy(), and native cookie name conflict
diff --git a/system/core/Loader.php b/system/core/Loader.php
index a62cf06..01d99dd 100644
--- a/system/core/Loader.php
+++ b/system/core/Loader.php
@@ -911,7 +911,7 @@
 			$class = substr($class, $last_slash);
 
 			// Check for match and driver base class
-			if (strtolower($subdir) == strtolower($class) && ! class_exists('CI_Driver_Library'))
+			if (strtolower(trim($subdir, '/')) == strtolower($class) && ! class_exists('CI_Driver_Library'))
 			{
 				// We aren't instantiating an object here, just making the base class available
 				require BASEPATH.'libraries/Driver.php';
@@ -1005,6 +1005,12 @@
 			$path = strtolower($class).'/'.$class;
 			return $this->_ci_load_class($path, $params);
 		}
+		else if (ucfirst($subdir) != $subdir)
+		{
+			// Lowercase subdir failed - retry capitalized
+			$path = ucfirst($subdir).$class;
+			return $this->_ci_load_class($path, $params);
+		}
 
 		// If we got this far we were unable to find the requested class.
 		// We do not issue errors if the load call failed due to a duplicate request