Delay retries on connection failure.
Delay retries on connection failure.

Avoids tight loop if proxy is down.

TrimBiggs/calico,matthewdupre/felix,neiljerram/felix,alexhersh/calico,alexhersh/calico,neiljerram/felix,TrimBiggs/calico,matthewdupre/felix,neiljerram/felix,Metaswitch/calico,neiljerram/felix,Metaswitch/calico