* Make helper associated fn
* Add feature definition
* Add handling to preserve program-id write lock when upgradeable loader is present; restore bpf upgrade-self test
* Use single feature
* Version transaction message and add new message format
* Update abi digest due to message path change
* Update v0.rs
Fix comment
* Update original.rs
* Update message versions name and address map indexes field name
* s/original/legacy
* update comment
* cargo fmt
* Update abi digest due to legacy rename