nk9453

events {
	# nginx requires this section even when applying all default values
	}
http {
	# Upstream keyword is followed by a url (domain name/IP).  This reference encapsulates 
	# the list of backend servers defined for a virtual proxy.  When autnenticating 
	# a certificate from a backend server, the upstream url is supplied to the 
	# certificate authentication process instead of the backend server name. See
	# the comments associated with proxy_pass below for a detailed discussion.