Use / instead of ! for regex delimiter to prevent syntax collor errors in older vim

root/etc/e-smith/events/actions/generate-email-sign

@@ -96,8 +96,8 @@ foreach my $user (@users){
     my $street = $user->prop('Street') || '';
     my $city = $user->prop('City') || '';
     my $url = $user->prop('Url') || '';
-    $url =~ s!^https?://!!;
+    $url =~ s/^https?:\/\///;
-    $url =~ s!/$!!;
+    $url =~ s/\/$//;
     my $template = $user->prop('SignatureTemplate') || "email";
 
     my $addr = "$street $postalcode $city";