Lowercase domain before check (cpriego#135)

This PR resolves cpriego#128

Author: TheNodi

server.php

@@ -121,7 +121,7 @@ function valet_path_to_slug($path) {
 
 $siteName = basename(
     // Filter host to support xip.io feature
-    valet_support_xip_io(explode(':',$_SERVER['HTTP_HOST'])[0]),
+    valet_support_xip_io(explode(':',strtolower($_SERVER['HTTP_HOST']))[0]),
     '.'.$valetConfig['domain']
 );