pgsql: Expand pg_control information so that we can verify that the

Log Message:
-----------
Expand pg_control information so that we can verify that the database
was created on a machine with alignment rules and floating-point format
similar to the current machine. Per recent discussion, this seems like
a good idea with the increasing prevalence of 32/64 bit environments.

Modified Files:
--------------
pgsql/src/backend/access/transam:
xlog.c (r1.218 -> r1.219)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xlog.c.diff?r1=1.218&r2=1.219)
pgsql/src/bin/pg_controldata:
pg_controldata.c (r1.25 -> r1.26)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_controldata/pg_controldata.c.diff?r1=1.25&r2=1.26)
pgsql/src/bin/pg_resetxlog:
pg_resetxlog.c (r1.36 -> r1.37)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_resetxlog/pg_resetxlog.c.diff?r1=1.36&r2=1.37)
pgsql/src/include/catalog:
pg_control.h (r1.23 -> r1.24)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_control.h.diff?r1=1.23&r2=1.24)