use haproxy stats socket to enable/disable backends when possible
use haproxy stats socket to enable/disable backends when possible

we still resort to reloading haproxy when we need to add backends or when something doesn't work

gini/synapse,freiheit-com/synapse,airbnb/synapse,bobtfish/synapse,tdooner/synapse,StephanErb/synapse,democracyworks/synapse,claydotio/synapse,bobtfish/synapse,dallasmarlow/synapse,Yelp/synapse,lsjostro/synapse,bcicen/synapse,hankya/synapse,jolynch/synapse,EasonYi/synapse,yonglehou/synapse-1,johnmccabe/synapse,asiragusa/synapse