Update text for RESET CONNECTION:

<   all temporary tables, removal of any NOTIFYs, cursors, prepared
<   queries(?), currval()s, etc.  This could be used for connection pooling.
<   We could also change RESET ALL to have this functionality.
>   temporary tables, removing any NOTIFYs, cursors, open transactions,
>   prepared queries, currval()s, etc.  This could be used  for connection
>   pooling.  We could also change RESET ALL to have this functionality.
>   The difficult of this features is allowing RESET ALL to not affect
>   changes made by the interface driver for its internal use.  One idea is
>   for this to be a protocol-only feature.  Another approach is to notify
>   the protocol when a RESET CONNECTION command is used.