This changes forks the mysql part of the Macaron session middleware.
In the forked mysql file:
- takes in a config setting for SetConnMaxLifetime (this solves wait_timeout
problem if it is set to a shorter interval than wait_timeout)
- removes the panic when an error is returned in the Exist function.
- retries the exist query once
- retries the GC query once
Dan Cech
Daniel Lee