Change Details

This includes renaming Downcase() to ToLower() and make it return a string rather than modify referenced arg. Also adds ToUpper() string version. This is a backport of Core PR16566

This includes renaming Downcase() to ToLower() and make it return a string rather than modify referenced arg. Also adds ToUpper() string version. This is a backport of Core [[https://github.com/bitcoin/bitcoin/pull/16566 | PR16566]]

This includes renaming Downcase() to ToLower() and make it return a string rather than modify referenced arg. Also adds ToUpper() string version. This is a backport of Core [[https://github.com/bitcoin/bitcoin/pull/16566 | PR16566]]