Change postgres default template0 to UTF8 encoding

psqlfix.txt

update pg_database set datallowconn = TRUE where datname = 'template0';
\c template0
update pg_database set datistemplate = FALSE where datname = 'template1';
drop database template1;
create database template1 with template = template0 encoding = 'UTF8';
update pg_database set datistemplate = TRUE where datname = 'template1';
template1
update pg_database set datallowconn = FALSE where datname = 'template0';