Files in this drectory ending in .conf are included to the main
configuration. Use this for exported nbd devices.
For example file export1.conf:

[export1]
	exportname = /export/nbd/export1-file
	authfile = /export/nbd/export1-authfile
	timeout = 30
	filesize = 10000000
	readonly = false
	multifile = false
	copyonwrite = false
	prerun = dd if=/dev/zero of=%s bs=1k count=500
	postrun = rm -f %s