Bug#420949: New upgrade of libc6 2.5.* renders shells unusable

[David Baron <d_baron@012.net.il>]

> Any news about that? Could we close the bug?

My Debian box is working 100% OK. Can upgrade other stuff as well.

However:
After a recent post about libc6 upgrade trashing someone's sarge, I recommend 
the following:

1. Pre-configure:
Check running kernel. If not new enough, STOP NOW.
Check current environment for inappropriate LD_ASSUME_KERNEL. If present, warn 
user and STOP NOW.
Check files such as /etc/environment, /etc/profile for inappropriate 
LD_ASSUME_KERNEL.. If found, tell user to delete it before proceding (just 
like it told be to get rid of the /usr/lib entries) and STOP NOW.
Warn user NEVER to run 2.4 kernels again. Opportunity to abort upgrade.

2. If all is OK
Warn user about LD_ASSUME_KERNEL again.
Rewarn user about 2.4 kernels.

There are still folk running 2.4 kernels for whatever reason. So before 
closing, we must prevent catastrophic results.