[Merge] lp:~jamesodhunt/upstart/bug-1324096 into lp:upstart

[James Hunt]

I'm going to change SetEnvMulti to SetEnvList and UnsetEnvMulti to UnsetEnvList as suggested by slangasek since the new names offer more of a hint as to what the methods actually do :)
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https://code.launchpad.net/~jamesodhunt/upstart/bug-1324096/+merge/221743
Your team Upstart Reviewers is requested to review the proposed merge of lp:~jamesodhunt/upstart/bug-1324096 into lp:upstart.