- core#928

Add new hardcoded seed node

Update blessed snap-941761

Add VIP router to node_aliases

Bump core and update snap for 7/22 release

Upgrade to hbbft version without PBC encryption support

Add audit for var-78

validator 1.1.0

- add more predicates for gossip peers
- add bloom gossip
- retune connections
- update core to have new vars

Add audit for var-77

Add audit-76

Clean up JSON/RPC API for proper use of errors and data types.

- core#880

Add snap, global follow mode

bump sibyl, grpcbox deps to pull in fix for silencing invalid_preface error logging

add version to jsonrpc

Clean up the JSON/RPC API results so that conditional states, missing data
and errors are all easier to detect programmatically. General principles:

* When there is an error, make sure to consistenly use the ?jsonrpc_error()
  macro.

* If a value is semantically boolean, make it so in the result set. Don't
  return a string.

* If there's no particular error in a query, but there's no data for an item
  then try to use `null` instead of a specialized strings such as "undefined".

* If a query only returns data if the validator/miner is in a specific mode,
  try to ensure that there is a consistently available attribute that
  can be checked _first_ in the result set. Don't make clients try to guess
  the state by checking for the existence of other items, or even worse,
  by checking the returned datatype.

  Example: `dkg_queue`. Before this change, `dkg_queue` either returned

      `{ "error" : "not running" }` (return type is dictionary)
  or
      `[ {"name":...,"address":...}, ... ]` (return type is array)

  Now returns either

      `{ "running": false }`
  or
      `{ "running": true, "consensus_members" : [ ... ] }`

add height dbus endpoint

Implement ability to query stats for a single validator.

add block age dbus endpoint