Bug#51876: apt: /usr mount read-only

[mverdier@chez.com]

Package: apt
Version: 0.3.10slink11

After an apt-get upgrade and also after an apt-get dist-upgrade
/usr was mount read-only. I could not umount it, it was busy.
A reboot set up /usr again read-write.


-- System Information
Debian Release: 2.1
Kernel Version: Linux cholera 2.2.11 #1 Mon Nov 1 14:04:17 CET 1999 i586 unknown

Versions of the packages apt depends on:
ii  libc6           2.0.7.19981211 GNU C Library: shared libraries
ii  libstdc++2.9    2.91.66-0slink The GNU stdc++ library (egcs version)