1.Take domain types into account in SQLColumns() (Thanks to Luiz K. Matsumura).

1.Take domain types into account in SQLColumns() (Thanks to Luiz K. Matsumura).
2.Take RESTRICT actions into account in SQLForeignKeys() (report from Farid Zidan).
3.Fix a bug that small negative decimal values are mistaken for
  non-negative (bug report from Dominic Smith).
4.Use MSG_NOSIGNAL/MSG_NOSIGPIPE option on send()/recv() to avoid
  crash on SIGPIPE (bug report from Brian Feldman).
5.Remove a spurious "." with no trailing digits in timestamp representation
  (bug report from Brian Feldman).
6.Rename trim() funtion in order to avoid conflict of function name
  (report from Dominic Smith).
7.Put back the change to add *read only* clause for read only cursors.
8.Improve pgtype_transfer_octet_length().