Document the NOTARY_AUTH environment variable
Document the NOTARY_AUTH environment variable

Signed-off-by: cyli <32343db1934300fd0ed129631fafa980a37ec297@twistedmatrix.com>

HuKeping/notary,jfrazelle/notary,endophage/notary,endophage/notary,docker/notary,HuKeping/notary,johnsandiford/notary,johnsandiford/notary,jfrazelle/notary,endophage/notary,johnsandiford/notary,docker/notary,jfrazelle/notary,HuKeping/notary,docker/notary