pgsql: Enhanced containment selectivity function for /contrib/ltree

Log Message:
-----------
Enhanced containment selectivity function for /contrib/ltree

Matteo Beccati

Modified Files:
--------------
    pgsql/contrib/ltree:
        ltree.sql.in (r1.10 -> r1.11)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/ltree/ltree.sql.in.diff?r1=1.10&r2=1.11)
    pgsql/src/backend/utils/adt:
        geo_selfuncs.c (r1.27 -> r1.28)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/geo_selfuncs.c.diff?r1=1.27&r2=1.28)
        selfuncs.c (r1.199 -> r1.200)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/selfuncs.c.diff?r1=1.199&r2=1.200)
    pgsql/src/include/catalog:
        pg_proc.h (r1.406 -> r1.407)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_proc.h.diff?r1=1.406&r2=1.407)
    pgsql/src/include/utils:
        selfuncs.h (r1.28 -> r1.29)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/selfuncs.h.diff?r1=1.28&r2=1.29)