Fixes the following security vulnerabilities:
- CVE-2019-14271: In Docker 19.03.x before 19.03.1 linked against the GNU C
Library (aka glibc), code injection can occur when the nsswitch facility
dynamically loads a library inside a chroot that contains the contents of
the container
Signed-off-by: Christian Stewart <christian@paral.in>
[Peter: mention security impact]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>