Log Message:
-----------
Add mention that tid perhaps someday should be output as a record.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
tid.c (r1.50 -> r1.51)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tid.c.diff?r1=1.50&r2=1.51)