pgsql: Let initdb detect the date order of the lc_time locale and

Log Message:
-----------
Let initdb detect the date order of the lc_time locale and initialize the
datestyle parameter of the new cluster accordingly.

Modified Files:
--------------
pgsql/doc:
TODO (r1.1720 -> r1.1721)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1720&r2=1.1721)
pgsql/doc/src/sgml:
config.sgml (r1.37 -> r1.38)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/config.sgml.diff?r1=1.37&r2=1.38)
pgsql/src/bin/initdb:
initdb.c (r1.100 -> r1.101)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/initdb/initdb.c.diff?r1=1.100&r2=1.101)