Address cargo-audit for crossbeam

See merge request memri/pod!243

Fix file_upload url decoding

See merge request !241

Add support for PluginAuth for file upload

See merge request !240

Improve HTTP body parsing error reporting

See merge request !239

Fix hosted kubectl to only run plugins once

See merge request !236

Fix kubernetes image names

See merge request memri/pod!235

Include full docker in docker image

See merge request !234

Pin and periodically update docker base image

See merge request !233

See memri/pod#401
for longer-term solution

unsafe mode

See merge request memri/pod!208

Fix cargo audit

See merge request memri/pod!231

zeroize has to be kept at 1.3.0 for now to keep compatibility with
another dependency of the Pod, chacha20poly1305.

# Conflicts:
#	src/plugin_run.rs

In the future, Schema interaction will be
re-factored to a different approach.
It will be scoped per-plugin. For now creating duplicates
of the Schema items feels like a better approach..