On Puppet 3.7.4 with the future parser enabled, undef values are
converted to empty strings, which evaluate as true. This means when
there are no user client options specified in Hiera,
$fin_users_client_options gets passed to create_resources as an empty
string, which is invalid.

Work around this Puppet bug by setting default options when
$hiera_users_client_options is an empty string.

Merge branch 'feature/per_user_config' of https://github.com/ccin2p3/puppet-ssh into ccin2p3-feature/per_user_config

Fixes to make puppet-lint happy

It's needed since due for a bug in puppet hiera_hash might return an …

Made config class compatible with new concat module

Corrected regression which applied server settings to the client configuration

* Manage users ssh configuration file
* Add rspec tests for new define type
* Add documentation for the new define type

It's needed since due for a bug in puppet hiera_hash might return an empty string instead of the default value.

This method has the benefit of being backwards compatible as well as
future compatible.

fix unspecified ssh_config file permissions

Works fine on puppetlabs-concat release 1.2.0

Support for merging options hash using multi-level hierarchy in hiera

Prevent empty Port or ListenAddress config parameters

Convert booleans to yes/no.

Fix for future parser.

Revert "Add explicit allow_virtual parameters"

Fixes #88.

Unquoted words starting with a capital are now treated
as type names.

This reverts commit f63ae3b0.

`allow_virtual` parameter was added in Puppet 3.6.1. On Puppet version
before this version, this parameter cause a catalogue compilation fail
`Invalid parameter allow_virtual`.

Refs: https://tickets.puppetlabs.com/browse/PUP-2746

This parameter should not be managed inside this module, but on top side
or in puppet configuration file.

  # site.pp or assimiled
  if versioncmp($::puppetversion,'3.6.1') >= 0 {
    $allow_virtual_packages = hiera('allow_virtual_packages',false)
    Package {
      allow_virtual => $allow_virtual_packages,
    }
  }

Or in puppet.conf, in order to remove warnings

  # puppet.conf
  [main]
  disable_warnings=deprecations

Refs: https://docs.puppetlabs.com/references/latest/configuration.html#disablewarnings