changelog: * lib/rims/auth.rb, lib/rims/passwd.rb, test/test_passwd.rb: refactored API of password source plug-in. explanation comments are added for passowrd source plug-in API.
changelog: * lib/rims/auth.rb, lib/rims/passwd.rb, test/test_passwd.rb: refactored API of password source plug-in. explanation comments are added for passowrd source plug-in API.

y10k/rims