Caps based sec, as much as we can with Python

[goodboy]

Dumping resources on this for now, will update and refine later.

Relates to #294 and friends.

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Resources from a buncha past digging:

• https://github.com/capnproto/pycapnp
• http://www.skyhunter.com/marcs/capabilityIntro/index.html
• https://mrkaran.dev/posts/home-server-nomad/
• http://www.catb.org/~esr/writings/taoup/html/ch06s06.html
• https://juliahub.com/docs/Actors/LA8B4/0.1.0/
• https://capnproto.org/
• https://sandstorm.io/how-it-works#capabilities
• https://www.youtube.com/watch?v=CMB6AlE1QuI
• https://sandstorm.io/
• https://genode.org/documentation/genode-foundations/20.05/architecture/Inter-component_communication.html#Asynchronous_bulk_transfer_-_packet_streams
• https://capnproto.org/rpc.html
• https://capnproto.org/language.html#language-reference
• http://capnproto.github.io/pycapnp/quickstart.html#rpc
• http://capnproto.github.io/pycapnp/quickstart.html#full-examples
• http://www.dalnefre.com/wp/2010/05/deconstructing-the-actor-model/
• http://www.erights.org/elib/capability/index.html
• https://dundalek.com/grammkit/

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pertaining to actors

• http://rsyscall.org/rsyscall/environ.html#rsyscall.environ.Environment.which
• http://www.dalnefre.com/wp/2017/09/computer-security-breaches-are-preventable/
• http://www.dalnefre.com/wp/2017/02/distributed-security/