[PATCH] Add a recycle_maxage attribute to backend definitions.

[Nils Goroll]

Hi Martin,

it's cool you are addressing this issue, thanks. I have not tested your patch
(yet) but at first sight it looks good to me. If no-one else did a real review
and phk thinks it is necessary, I could probably do it on Friday.

While your patch appears to be a real improvement which I'd like to see
integrated, I still think we should have some backend connection nanny thread
doing this work preventatively and out of context of the backend thread
desperately in need of a backend connection.

Cheers, Nils