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IPv6 support
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In order to support IPv6 addresses to connect to MySQL, Perl DBD::MySQL driver v4.033_01 is
required. Also, as stated in RFC 3986 `https://www.ietf.org/rfc/rfc3986.txt <https://www.ietf.org/rfc/rfc3986.txt>`_ section 3.2.2
brackes must be used to distinguish host and port.
Examples: `https://metacpan.org/pod/DBD::mysql#port <https://metacpan.org/pod/DBD::mysql#port>`_