Subdirectory records aren't generated properly in sites.php

It seems like subdirectories aren't generated properly in sites.php. They are printed out as "foo.bar/baz", and they should be ouputted as "foo.bar.baz".

There are templates specific for nginx and apache that replaces the "/" with a ".", but they are not used. Instead a generic sites.php is used (which is probably more appropriate, since the output is the same no matter what server you may be using).

The sites.php template that is used does not replace the slashes, which results in a broken setup for subdirectories. The attached patch adds the same logic to that template as in the other templates.