Make copy_test.go failures easier to debug

Revert "Move rand string func to util for reuse"

Update volumes.md

Grammar adjustment

fix scartch doc

Detailed walkthrough docs cleanup

Remove the pre-production note.

Move rand string func to util for reuse

This was difficult to read so I made a grammatical adjustment.

- Consistent capitalization of IP
- Remove file name from some docs links
- Fix comma usage and typos

Add a known issues doc.

Fixing examples_test for moved files in #11595

Added Project Calico networking plugin tutorial

Cleanup docs.

- Fix typo in services-firewalls
- Fix incorrect comma usage
- s/minion/node/
- Link deadlock to wikipedia article
- Fix livenessProbe capitalization
- Change API reference quoting from " to \`

Add some additional text about getting help.

Add upgrade instructions.

Split namespace docs user vs admin.

Move namespace.md and examples dir from docs/user-guide
to docs/admin.

Assumption is that creating and deleting namespaces is an "admin"
task.

Add a mostly new user-guide to namespaces that gives more advice
on when to use namespaces, and how to work within them,
but not how to create/delete them.  It is more succinct than
before.

Fix links in DESIGN.md

Remove equals from heading which breaks our links.

grammar fixes

Improvements to quota doc.

Improve scratch getting-started-guide.

Address review comments in #11487

Fix capitalization of Kubernetes in the docs