* Signed-off-by: Anirudh Ramachandra <anramach@google.com>

Proposal for the xDS error propagation which allows xDS management
servers to provide additional information to the clients in case of
errors like permission errors or resource being missing.

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Formating changes: Trim empty whitespaces, add required identations for lists and nested lists

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Further formatting changes, add last updated date as well

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Few grammatical changes

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Readability improvements

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Remove Harvey from the approver list

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Remove NACK discussion from the Open Issue list

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Add reference to xRFC TP1 in the related proposals section

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Fix formatting with asterisks

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Rewrite background/abstract

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Improve the details around the protocol behavior.

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Make backward compatibility section clearer

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Address review comments including fixing links to be relative and rewording the wildcard resources section

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Change the xRFC to remove additional field and use status code directly

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Format the protocol behavior to be clearer

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Formatting changes

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Change must to may

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Clarify that wildcard subscriptions are not supported

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Fix protocol behavior to specify that the resources shouldn't intersect

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Add a section about CSDS changes

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

* Fix comment on the CSDS proto

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

---------

Signed-off-by: Anirudh Ramachandra <anramach@google.com>

Signed-off-by: Rohit Agrawal <rohit.agrawal@databricks.com>