Adjust regex to match some old pfns starting with 'guid://'

src/TJAlienFile.cxx

@@ -419,7 +419,7 @@ TJAlienFile *TJAlienFile::Open(const char *url, Option_t *option,
             // Everything is OK, return handler
             jalienfile->SetSE(seStr);
 
-            std::regex reg1("root://[a-z0-9-.]+:[0-9]+/");
+            std::regex reg1("[a-z]+://[a-z0-9-.]+:[0-9]+/");
             jalienfile->SetPfn(std::regex_replace(urlStr.Data(), reg1, "") + "#" + anchor);
             jalienfile->SetImage(imagenr);
             jalienfile->SetNreplicas(nreplicas);