[phpmailer] Add README and LICENSE

phpmailer/README.md

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+PHP Mailer SMTP
+============
+
+by Marcus Mueller
+
+This addon replaces the default `mail()` function by the `PHPMailer` library, allowing the use of an outbound SMTP server.
+
+Configuration
+-------------
+
+You can override the default value of the following config keys in your base Friendica install `config/addon.config.php` file:
+
+	'phpmailer' => [
+        // smtp (Boolean)
+        // Enables SMTP relaying for outbound emails
+        'smtp' => false,
+
+        // smtp_server (String)
+        // SMTP server host name
+        'smtp_server' => 'smtp.example.com',
+
+        // smtp_port (Integer)
+        // SMTP server port number
+        'smtp_port' => 25,
+
+        // smtp_secure (String)
+        // What kind of encryption to use on the SMTP connection.
+        // Options: '', 'ssl' or 'tls'.
+        'smtp_secure' => '',
+
+        // smtp_port_s (Integer)
+        // Secure SMTP server port number
+        'smtp_port_s' => 465,
+
+        // smtp_username (String)
+        // SMTP server authentication user name
+        // Empty string disables authentication
+        'smtp_username' => '',
+
+        // smtp_password (String)
+        // SMTP server authentication password
+        // Empty string disables authentication
+        'smtp_password' => '',
+
+        // smtp_from (String)
+        // From address used when using the SMTP server
+        // Example: no-reply@example.com
+        'smtp_from' => '',
+    ],
+
+License
+=======
+
+The _PHPMailer addon_ is licensed under the [GNU Affero General Public License v3](https://www.gnu.org/licenses/agpl-3.0.html).
+
+The _PHP Mailer_ library is licensed under the [GNU Lesser General Public License](https://www.gnu.org/licenses/lgpl-3.0.html).