Log Message:
Changes 5.6.1:
- Changed msSaveImageBufferGD to be in accordance with msSaveImageGD
- Changed the query map rendering implementation without adding extra layers
  to the map
- SQL Server 2008 plugin is not handling null field values correctly
- Hatch symbol not properly saved
- Expose symbolObj.inmapfile to the SWIG API, have already been exposed to PHP
- Expose getGeomTransform/setGeomTransform to SWIG instead of exposing the
  private vars for rfc48
- Fixed writeSymbol to support writing 'ANGLE AUTO'
- Fixed problems with point queries not working via the CGI (mode=query
  or mode=nquery)

Changes 5.6.0:
- Fixed potential leak of env. vars through msEvalRegex()
- WFS hits count is incorrect if the request contain 2 layers or more
- Fixed a problem with layer plugin where copyVirtualTable didn't copy
  the LayerResultsGetShape function pointer