Private files uploaded by email will now honour the file quota limit,
because the filesize is set correctly and checked against users'
remaining personal quota limit. Previously, attachment size was always
set to zero, and quota was checked against the draft area (this is
not valid for email uploads, because each file is moved out of the
draft area as it is processed, so multiple files totalling greater
than the remaining quota would still pass the check).
The new recordset support for Postgres requires transactions and
will cause errors if recordsets are not closed correctly. This
commit fixes problems that were identified during unit tests, and
via some basic code analysis, across all core code. Most of these
are incorrect usage of recordset (forgetting to close them).
Too many lines were being removed for GMail senders. The function was
also removed because it is no longer used, and guessing the client
and cutting accordingly is a poor approach and will probably lead
to issues similar to this one.
