I just tried both C.UTF-8, en_US.UTF-8 and es_ES.ISO8859-1. In all
cases PG refuses to init. unsetting them (or using POSIX) will allow
creating the cluster ( defaulting to SQL_ASCII)
tolstoy# export LC_ALL="C.UTF-8"
tolstoy# /etc/rc.d/pgsql oneinitdb
Initializing PostgreSQL databases.
initdb: error: invalid locale settings; check LANG and LC_*
environment variables
pg_ctl: database system initialization failed
This works if you use LC_CTYPE instead: `export LC_CTYPE=C.UTF-8' -RVP