* Use experimental as feature stage
Pre-alpha/Development are deprecated in favor of Experimental (see
https://github.com/istio/community/pull/495). Update docs to reference
this phase.
* Add DNS proxying to experimental phase
* Do not mix alpha and experimental
* DNS Proxying is Alpha in 1.9; add to feature status page
* Fix virtual machine install doc based on review
* Fix linting issue
* Add documentation for DNS proxy
Basically converting
https://preliminary.istio.io/latest/blog/2020/dns-proxy/ to a doc
* Apply suggestions from code review
Co-authored-by: Frank Budinsky <frankb@ca.ibm.com>
* Update content/en/docs/ops/configuration/traffic-management/dns-proxy/index.md
Co-authored-by: Frank Budinsky <frankb@ca.ibm.com>
Co-authored-by: Frank Budinsky <frankb@ca.ibm.com>