p5-dbd-mysql - update to mysql51, mysql55, mariadb, percona

[macintosh@…]

updating the port to the new structure in the port system for mysql.

1) variants mysql4 & mysql5 have been removed
2) variants mysql51, mysql55, mariadb & percona have been added

a) mysql51 & mysql55 have been tested and used in production
b) mariadb & percona haven't been tried at all - yet

[ryandesign@…]

You should only set default_variants +mysql55 if the user has not already requested a different variant. See wiki:PortfileRecipes#default_variants .

[pixilla@…]

Let's not remove mysql5 variants until all ports with mysql5 variants have been updated to use the newer mysql ports.

[pixilla@…]

See r93233