Pool objects in MySqlDataSource

[bgrainger]

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MySqlDataSource has methods to create connections and commands. It might be a performance enhancement (from creating less garbage) to pool and reuse these objects.

Disposing a MySqlConnection or MySqlCommand would clear its internal values and return it to the MySqlDataSource.

MySqlConnection.CreateCommand could also pull from the pool if the MySqlConnection were associated with a MySqlDataSource.

It might also be possible to pool MySqlDataReader objects.