On windows machines, the `path_join` build wrong URL by using
backslash as separator.

URL used for fileserver access must use only slashes `/`.

We avoid compatibility break with user pillars by looking up
configuration values using `config.get` in configurable roots.

We provide a new parameter `map_jinja:config_get_roots` in the formula
`parameters/defaults.yaml`to retrives values not only from
`tplroot=openssh` but from `sshd_config` and `ssh_config` too.

We need to update the `_mapdata` reference files to include the new
`map_jinja:config_get_roots`.

The `map.jinja` now exports a single variable called `mapdata`.

We extract the `openssh`, `sshd_config` and `ssh_config` from it to
minimize the changes to `.sls` files.

```bash
Examining openssh/map.jinja of type state
[209] Jinja comment should have spaces before and after: {# comment #}
openssh/map.jinja:4
{## Start imports as  ##}

[209] Jinja comment should have spaces before and after: {# comment #}
openssh/map.jinja:19
{## merge the openssh pillar ##}
```

* Add map for debian

* drop default values (fixes #102)
* hmac-ripemd160 was dropped in 7.6

Added defaults.yaml and map.jinja similar to template-formula and salt-formula

This state manages /etc/ssh/ssh_known_hosts and fills it with
public SSH host keys of other minions.

Correct indentation