[PATCH v2] support_become_root: Don't fail when /proc/<pid/setgroups is missing

[Florian Weimer]

On 11/18/2017 04:13 PM, Christian Brauner wrote:
> The requirement to write "deny" to/proc/<pid>/setgroups for a given user
> namespace before being able to write a gid mapping was introduced in Linux
> 3.19.  Before that this requirement including the file did not exist.
> So don't fail when errno == ENOENT.
> 
> Signed-off-by: Christian Brauner<christian.brauner@ubuntu.com>

glibc uses an FSF copyright assignment and not the DCO, so this line is 
misleading.

Patch looks okay, please commit.

Thanks,
Florian