Merge pull request #452 from kenyon/delete-sync-dir

## Classes

### postfix

The top-level class, to install and configure Postfix.

## Definitions

### postfix::config

Add/alter/remove options in Postfix main configuration file (main.cf)

### postfix::hash

Creates Postfix hashed "map" files, and build the corresponding db file.

### postfix::transport

Manages content in the transport map.

### postfix::virtual

Manages content in the virtual map.

This module requires Augeas.

## Simple usage

    include postfix

    postfix::config { "relay_domains": value  => "localhost host.foo.com" }

## Exec paths

In order to not have any path problem, you should add the following line in

some globally included .pp file:

    Exec {

      path => '/some/relevant/path:/some/other:...',

    }

For example:

    Exec {

      path => '/bin:/sbin:/usr/sbin:/usr/bin',

    }