examples: document explicit flow in example config
examples: document explicit flow in example config

wolfeidau/dex,chub/coreos-dex,coreos/dex,rithujohn191/dex,chub/coreos-dex,ericchiang/dex,ericchiang/dex,Calpicow/dex,coreos/dex,chub/coreos-dex,Calpicow/dex,rithujohn191/dex,wolfeidau/dex,ericchiang/dex,wolfeidau/dex,Calpicow/dex,coreos/dex,rithujohn191/dex