aws/aws-cli — pull request #1062 by jamesls (2014-12-15 23:28:49+00:00)
Title: Fix AssumeRole functionality on windows

On windows, the `:` char is not allowed in the filename, so we replace these with an `_` char.
Also, for POSIX systems, the file is created with `0600` permissions to restrict access to the cache files.

cc @kyleknap @danielgtaylor