This is more reliable than version numbers which might change with point
releases (in particular for Debian Jessie) and is more likely to not
conflict between multiple OS.

Fix typo: `user_require` -> `use_require`

Replace require_all with use_require in map.jinja, we want to be able
to use custom Require values.

Remove uneeded Directory in standard.tmpl and add conditional and
default value for Require.

Fix bad filenames in standard.sls

- Adding confext to virtualhost names.
- Renaming the default config file for Ubuntu (000-default.conf).
- Adding ability to use "Require all granted".