multi level C<#> wildcards. Defaults to B<collectd/#>, i.e. all topics beneath
the B<collectd> branch.
+=item B<CACert> I<file>
+
+Path to the PEM-encoded CA certificate file. Setting this option enables TLS
+communication with the MQTT broker, and as such, B<Port> should be the TLS-enabled
+port of the MQTT broker.
+
+=item B<CertificateFile> I<file>
+
+Path to the PEM-encoded certificate file to use as client certificate when
+connecting to the MQTT broker. Requires B<CertificateFile>
+
+=item B<CertificateKeyFile> I<file>
+
+Path to the unencrypted PEM-encoded key file corresponding to B<CertificateFile>.
+
+=item B<TLSprotocol> I<protocol>
+
+If configured, this specifies the string protocol version (e.g. tlsv1, tlsv1.2) to
+use for the TLS connection to the broker. If not set a default version is used which
+depends on the version of OpenSSL the Mosquitto library was linked against.
+
+=item B<CipherSuite> I<ciphersuite>
+
+A string describing the ciphers available for use. See the "openssl ciphers" utility
+for more information. If unset, the default ciphers will be used.
+
+
=back
=head2 Plugin C<mysql>