In some cases, dropped events around the time a new container is started
can result in missing the exec/clone for a process that does a setns to
enter the namespace of a container. Here's an example from an oss
capture:

```

282273 09:01:22.098095673 30 runc:[0:PARENT] (168555) < setns res=0
282283 09:01:22.098138869 30 runc:[0:PARENT] (168555) < setns res=0
282295 09:01:22.098179685 30 runc:[0:PARENT] (168555) < setns res=0
517284 09:01:30.128723777 13 <NA> (168909) < setns res=0
517337 09:01:30.129054963 13 <NA> (168909) < setns res=0
517451 09:01:30.129560037 2 <NA> (168890) < setns res=0
524597 09:01:30.162741004 19 <NA> (168890) < setns res=0
527433 09:01:30.179786170 18 runc:[0:PARENT] (168927) < setns res=0
527448 09:01:30.179852428 18 runc:[0:PARENT] (168927) < setns res=0
535566 09:01:30.232420372 25 nsenter (168938) < setns res=0
537412 09:01:30.246200357 0 nsenter (168941) < setns res=0
554163 09:01:30.347158783 17 nsenter (168950) < setns res=0
659908 09:01:31.064622960 12 runc:[0:PARENT] (169023) < setns res=0
659919 09:01:31.064665759 12 runc:[0:PARENT] (169023) < setns res=0
732062 09:01:31.608297074 4 nsenter (169055) < setns res=0
812985 09:01:32.217527319 6 runc:[0:PARENT] (169077) < setns res=0
812991 09:01:32.217579396 6 runc:[0:PARENT] (169077) < setns res=0
813000 09:01:32.217632211 6 runc:[0:PARENT] (169077) < setns res=0
```

When this happens, it can cause false positives for the "Change thread
namespace" rule as it allows certain process names like "runc",
"containerd", etc to perform setns calls.

Other rules already use the proc_name_exists macro to require that the
process name exists. This change adds proc_name_exists to the Change
Thread Namespace rule as well.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Let programs spawned by linux-bench (CIS Linux Benchmark program) read
/etc/shadow. Tests in the benchmark check for permissions of the file
and accounts in the contents of the file.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Previously any write to a file called sources.list would match the
access_repositories condition, even a file /usr/tmp/..../sources.list.

Change the macro so the files in repository_files must be somewhere
below any of repository_directories.

Also allow programs spawned by package management programs to change
these files, using package_mgmt_ancestor_procs.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Add several calico images and command line programs that end up writing
below /etc/calico.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Let mysqlsh write below /root/.mysqlsh.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Related to https://github.com/GoogleCloudPlatform/guest-oslogin, full
cmdline is google_oslogin_control.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Sort the items in the list falco_privileged_images alphabetically
and also separate them into individual lines. Make it easier to note
changes to the entries in the list using git blame.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Most of these are seen in GKE and are uses for core routing/metrics
collection.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Add a set of images known to run in the host network. Mostly related to
GKE, sometimes plus metrics collection.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Seen when using K8s cluster autoscaling or addon manager.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Add several images seen in GKE environments that can run in the
kube-system namespace.

Also change the names of the lists to be more specific. The old names
are retained but are kept around for backwards compatibility.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Add system:managed-certificate-controller as a system role that can be
modified. Can be changed as a part of upgrades.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

Start versioning trace files with a unique date. Any time we need to
create new trace files, change TRACE_FILES_VERSION in this script and
copy to traces-{positive,negative,info}-<VERSION>.zip.

The zip file should unzip to traces-{positive,negative,info}, without
any version.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>