apt wants to remove bash, base-files; other move questions

[David Wood <obsidian@panix.com>]

Now using

deb http://amd64.debian.net/debian/ sid main contrib

An upgrade wants to remove base-files and bash. Digging deeper, I see
base-files is being removed because:

base-files pre-depends on libc6 (< 2.3.2.dsl-20.0.1)

I saw some traffic on the list that looked similar. But I don't
understand what you did, and I don't want to guess wrong and hose my
whole system.

Do I want base-files 3.1.2-0.0.0.3.pure64? Or just 3.1.2?

Do I want libc6 2.3.2.ds1-20.0.0.1.pure64? or 2.3.2.ds1-21?

What is the safest way to handle this transition?

-David