wrong information about unlimied size of text field?

hi
according to what i know, where is a limit for up to 2gigabytes of data
in text fields (according to c.h).
this limit is of course very big, but i belive it should be mentioned in
datatype.sgml instead of saying:

<entry><type>text</type></entry>
<entry>Variable unlimited length</entry>

if this is not the case, i'd like some information how longer text's can
be stored, when text is internally of "varlena" type, where
varlena.vl_len is of int32 type.

best regards

depesz

--
hubert depesz lubaczewski                          http://www.depesz.pl/
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Mój Boże, spraw abym milczał, dopóki się nie upewnię,  że  naprawdę  mam
coś do powiedzenia.                                      (c) 1998 depesz