escape comments to avoid repeated puppet runs

[raybellis]

Pull Request (PR) description

This PR replaces #66 and is rebased to the latest master branch

This Pull Request (PR) fixes the following issues

Regex meta-characters in an sshd_config_match name parameter cause repeated file updates at every Puppet run

[bastelfreak]

thanks for the PR, can you add an example that would fail without this code or add a test for it?

[raybellis]

@bastelfreak With the stock code this configuration:

sshd_config_match { 'Host 2001:xxx:*::8':
   comment => 'IPv6 match'
}

results in this "change" during every Puppet run:

Notice: /Stage[main]/XXX/Sshd_config_match[Host 2001:xxx:*::8]/comment: comment changed 'Host 2001:xxx:*::8: IPv6 match' to 'IPv6 match' (corrective)

Applying an RE escape to the resource's name before the regex match resolves this issue.