Fix the default Subystem sftp-server path for SLE

Allow Host: * options to be overridden in the pillar

put the ssh_config Host:* options in the defaults file so they can be overridden

Add support for Host definitions in ssh_config

This gives us the ability to define system-wide definitions for specific Hosts, and their options.

For example, with this in pillar:

```
# this is the place for host-wide SSH config
ssh_config:
  ...
  Hosts:
    # this simplifies cloning with custom params
    # eg: git clone my-git:foo/bar
    my-git:
      User: git
      HostName: git.example.com
      Port: 2222
```

This would add a section in `/etc/ssh/ssh_config`:

```
Host my-git
    User git
    HostName git.example.com
    Port 2222
```

Replaced iteritems deprecated function with items

Added default path for sftp Subsystem in FreeBSD

Signed-off-by: POTIER Mathieu <mathieu.potier@onzeway.eu>

Signed-off-by: POTIER Mathieu <mathieu.potier@onzeway.eu>

Added configuration options for ssh_config

Made a small change to reflect the default sshd_config

The default value for ServerKeyBits is 1024 both upstream and in distros

Use iteritems() instead of items().

Signed-off-by: René Jochum <rene@jochums.at>

Signed-off-by: René Jochum <rene@jochums.at>

Signed-off-by: René Jochum <rene@jochums.at>

add options to give a key size to generate_key

Adds support to customize /etc/ssh/moduli file

adds support to harden sshd_config (KeyExchange, Ciphers, MACs)

Stop messing up the first line in ssh_known_hosts

Fix service name for Arch Linux

Add option to remove ssh_host_keys

Improve default lookup

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

Fix mine_function example in pillar.example

This fixes #34, salt version 2015.5.x needs an extra argument
for shell routines.

added the missing ":" and delete the redundant lines

Fix bug that added : at the end of the key

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

add gentoo support

Refactor auth.sls to allow more keys for one user