whitespace cosmetics
Merge branch 'master' of https://github.com/catwell/lua-http-digest

Conflicts:
	http-digest.lua
basic support for set-cookie

httpbin now requires basic cookie support
(see 180283a60a1d060309eefdca3d769b1ec2d2ddb9 in their repo)

To make tests pass, add it to lua-http-digest.
This is not mandated by the RFC though.