mount_namespaces.7, namespaces.7: Relocate reference to pam_namespace(8)

SEE ALSO: move pam_namespace(8) from namespaces(7) to
mount_namespaces(7) (since pam_namespace(8) makes use of
mount namespaces specifically).

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2 files changed