jenkinsci/swarm-plugin — pull request #22 by zbintliff (2014-12-26 21:22:40+00:00)
Title: added new option 'passwordEnvVariable'

We are using this plug in in our production environment are were not comfortable with passing command line argument so now you can pass in an environment variable name. It will get the value during runtime and set it. That way passwords are at least a little more secure (not viewable with a "ps -eaf")