[Bug 2070061] Re: Clean up the DEP17 dpkg diversions

[Michael Biebl]

Speaking of which, is the following expected (a system that has recently
been upgraded to 24.04):

```
# ls -la /
insgesamt 84
drwxr-xr-x  21 root root  4096 Jun 24 23:49 .
drwxr-xr-x  21 root root  4096 Jun 24 23:49 ..
lrwxrwxrwx   1 root root     7 Jan  7 00:36 bin -> usr/bin
drwxr-xr-x   2 root root  4096 Apr  8 16:46 bin.usr-is-merged
drwxr-xr-x   4 root root  4096 Jun 14 12:19 boot
drwxr-xr-x  19 root root  5040 Jun 24 23:46 dev
drwxr-xr-x 148 root root 12288 Jun 24 23:48 etc
drwxr-xr-x   3 root root  4096 Jan 19 17:12 home
lrwxrwxrwx   1 root root     7 Jan  7 00:36 lib -> usr/lib
lrwxrwxrwx   1 root root     9 Jan  7 00:36 lib32 -> usr/lib32
lrwxrwxrwx   1 root root     9 Jan  7 00:36 lib64 -> usr/lib64
drwxr-xr-x   2 root root  4096 Apr  8 16:46 lib.usr-is-merged
lrwxrwxrwx   1 root root    10 Jan  7 00:36 libx32 -> usr/libx32
drwx------   2 root root 16384 Jan  6 23:19 lost+found
drwxr-xr-x   3 root root  4096 Jan 11 21:44 media
drwxr-xr-x   6 root root  4096 Jun  2 09:54 mnt
drwxr-xr-x   3 root root  4096 Jan  7 21:14 opt
dr-xr-xr-x 433 root root     0 Jun 24 23:45 proc
drwx------   9 root root  4096 Jun 14 12:02 root
drwxr-xr-x  35 root root   860 Jun 24 23:48 run
lrwxrwxrwx   1 root root     8 Jan  7 00:36 sbin -> usr/sbin
drwxr-xr-x   2 root root  4096 Apr  8 16:46 sbin.usr-is-merged
drwxr-xr-x   2 root root  4096 Feb 28 01:24 srv
dr-xr-xr-x  13 root root     0 Jun 24 23:48 sys
drwxrwxrwt  20 root root   520 Jun 24 23:51 tmp
drwxr-xr-x  14 root root  4096 Aug  8  2023 usr
drwxr-xr-x  14 root root  4096 Jun 14 12:23 var
```
Specifically those $foo.usr-is-merged directories?

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https://bugs.launchpad.net/bugs/2070061

Title:
  Clean up the DEP17 dpkg diversions

Status in base-files package in Ubuntu:
  In Progress
Status in glibc package in Ubuntu:
  In Progress

Bug description:
  For the DEP17 effort, we've introduced a number of dpkg diversions of
  the form $foo -> $foo.usr-is-merged, ahead of Debian. They've done
  since their own transition, and the diversions they added are much
  less numerous and much more discreet (only for "multiarch" dirs such
  as /lib64 and /lib32, and using /.$foo.usr-is-merged which is way less
  invasive).

  When merging glibc and base-files, where those diversions are added in
  the preinsts, we should take care of cleaning up our old diversions as
  well as whatever still clutter the filesystem.

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