Potential container path bug on Windows with no UUID being present

[nightlark]

Container path UUID may not be getting substituted in correctly on Windows. Either install prefix with C:/ is a problem, or multiple config file entries specifying same archive.

[nightlark]

Install prefix containing C:/ and C:\\ both appear to be okay, as do multiple config file entries specifying the same archive (when testing on a Unix-based system). Will do the same tests on Windows next.

One additional observation: symlinks don't result in additional entries being added to the containerPath list, only the installPath list. Not sure if this is a bug or a feature... it does give a way to distinguish which paths are symlinks, but it's unclear if symlinks are "contained" in an archive/installer/container or not.