pgsql: Arrange to set the LC_XXX environment variables to match our

Log Message:
-----------
Arrange to set the LC_XXX environment variables to match our locale setup.
Back-patch of previous fix in HEAD for plperl-vs-locale issue.

Tags:
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REL7_3_STABLE

Modified Files:
--------------
    pgsql/src/backend/access/transam:
        xlog.c (r1.109.2.5 -> r1.109.2.6)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xlog.c.diff?r1=1.109.2.5&r2=1.109.2.6)
    pgsql/src/backend/main:
        main.c (r1.55 -> r1.55.2.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/main/main.c.diff?r1=1.55&r2=1.55.2.1)
    pgsql/src/backend/utils/adt:
        pg_locale.c (r1.20 -> r1.20.2.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/pg_locale.c.diff?r1=1.20&r2=1.20.2.1)
    pgsql/src/include/utils:
        pg_locale.h (r1.14 -> r1.14.2.1)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/pg_locale.h.diff?r1=1.14&r2=1.14.2.1)