* removing ssz-only flag
* gaz
* reverting other uses of sszonly
* gaz
* adding kasey and radek's suggestions
* update changelog
* adding test
* radek advice with new headers and tests
* adding logs and fixing comments
* adding logs and fixing comments
* gaz
* Update validator/client/beacon-api/rest_handler_client.go
Co-authored-by: Radosław Kapka <rkapka@wp.pl>
* Update api/apiutil/header.go
Co-authored-by: Radosław Kapka <rkapka@wp.pl>
* Update api/apiutil/header.go
Co-authored-by: Radosław Kapka <rkapka@wp.pl>
* radek's comments
* adding another failing case based on radek's suggestion
* another unit test
---------
Co-authored-by: Radosław Kapka <rkapka@wp.pl>