[development] db_tuning update

[FGM]

Hi,

I've updated the db_tuning.module from Punkcut25 's sandbox to work with
5.0RC2.

However:
- he has disabled his d.o. contact form
- he seems to have appeared last on IRC 17 weeks ago
- there is no email to contact him in his code
- his blog on civicspace does not give a contact address

So I don't know what to do:
- it seems unfair/unappropriate to create a d.o. project module for this,
since this is basically his code,
- it seems pointless to mention this in a forum post, as it will stay
ignored
- it seems wasteful to let the 5.0 go ignored: this code provides
interesting initial insight on mysql tuning

Any suggestions ?

FGM (osinet)