ofs: retry database connections forever
ofs: retry database connections forever

Rather than timing out and failing, we retry database connections
indefinitely and log on the first failure and every 10s after that.

Signed-off-by: David Scott <63c9eb0ea83039690fefa11afe17873ba8278a56@docker.com>

samoht/vpnkit,djs55/vpnkit,djs55/vpnkit,djs55/vpnkit