[PATCH] dbd-mysql: Fix breakage from Behavior>>#new changes
In ac2ada57d5a23eaaf7c8b913ca2a710bd7c53782 I had changed
>>#new to always call >>#initialize. When converting the
code I did not update the MySQLPacket class that assumes
that a stream has been set before initialize is being called.
Use >>#basicNew to avoid the early call to >>#initialize.
This has been found and analyzed by Mark Bratcher.