* Upon start up, don't insert head to proto array node DAG as index 0
* Merge branch 'master' of git+ssh://github.com/prysmaticlabs/prysm into fix-save-head-root
* Add HasNode
* Add fillInForkChoiceMissingBlocks
* Comments
* Test
* Fixed test
* Merge branch 'master' into proto-array-process-missing-block
* Merge branch 'master' into proto-array-process-missing-block
* Merge branch 'master' into proto-array-process-missing-block
* Run time
* Fixed pruning
* Fixed test
* Fixed test
* Process attestations during init sync
* Raul's feedback
Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>