pgsql: Add items: < * Research storing disk pages with no

Log Message:
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Add items:

< * Research storing disk pages with no alignment/padding
> * Consider ways of storing rows more compactly on disk
>
>     o Store disk pages with no alignment/padding?
>     o Reorder physical storage order to reduce padding?
>     o Support a smaller header for short variable-length fields?
>     o Reduce the row header size?

Modified Files:
--------------
    pgsql/doc:
        TODO (r1.1972 -> r1.1973)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/TODO.diff?r1=1.1972&r2=1.1973)
    pgsql/doc/src/FAQ:
        TODO.html (r1.474 -> r1.475)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/FAQ/TODO.html.diff?r1=1.474&r2=1.475)