* - enhance README to include security release process compatible wiht k8s
* - second version of Security release process, including "Collaborating Projects"
* - reformulate the security release process within a separated doc.
* - add following comment from Sec Team .part 1
* - refactored with comments from Security IB
- refactored considering the same existing document in another CNCF project (envoy)
* - adjust seucrity of README to point the new security process page
* - revert change on FOSSA
* - fix comments from John.
* - removing the todos (I pushed them on the description of the PR)
* - define the PST members in OWNER file
* - fix from review
- add a cahpter for mailing list presentation
* - point the PST members in OWNER file
* - register PST under name 'security' in OWNER file
- early announce will be on coredns-distributors-announce@googlegroup.com
- remove hall of fame reference
* - remove list of security team members from owner file. mailing list of security@coredns.io will be the reference
