pgsql-server: Reword: < * Allow hash buckets to fill disk pages, rather

Log Message:
-----------
Reword:

< * Allow hash buckets to fill disk pages, rather than being sparse

* Pack hash index buckets onto disk pages more efficiently

Modified Files:
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pgsql-server/doc:
TODO (r1.1270 -> r1.1271)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/doc/TODO.diff?r1=1.1270&amp;r2=1.1271)