1) Allow password which contains special characters like {,},=,;.

1) Allow password which contains special characters like {,},=,;.
2) Add a new data source option which makes it possible to use
   Kerberos for Windows library to reply to GSSAPI authentication
   request.
3) Native support for SSPI Kerberos or Negaotiate service. It may
   be useful for the 64-bit drivers.
4) Fix an oversight of Memory overflow handling.