
Previously, the default encoding was derived from the locale when using libc; while the default was always UTF-8 when using ICU. That would throw an error when the locale was not compatible with UTF-8. This commit causes initdb to derive the default encoding from the locale for both providers. If --no-locale is specified (or if the locale is C or POSIX), the default encoding will be UTF-8 for ICU (because ICU does not support SQL_ASCII) and SQL_ASCII for libc. Per buildfarm failure on system "hoverfly" related to commit 27b62377b4. Discussion: https://postgr.es/m/d191d5841347301a8f1238f609471ddd957fc47e.camel%40j-davis.com