libredwg-0.10-bp151.2.6.1

- Update to release 0.10
  * API breaking changes:
  * Added a new int *isnewp argument to all dynapi utf8text
    getters, if the returned string is freshly malloced or not.
  * removed the UNKNOWN supertype, there are only UNKNOWN_OBJ and
    UNKNOWN_ENT left, with common_entity_data.
  * renamed BLOCK_HEADER.preview_data to preview,
    preview_data_size to preview_size.
  * renamed SHAPE.shape_no to style_id.
  * renamed CLASS.wasazombie to is_zombie.
  * Bugfixes:
  * Harmonized INDXFB with INDXF, removed extra src/in_dxfb.c.
  * Fixed encoding of added r2000 AUXHEADER address.
  * Fixed EED encoding from dwgrewrite.
  * Add several checks against
    [CVE-2020-6609, boo#1160520], [CVE-2020-6610, boo#1160522],
    [CVE-2020-6611, boo#1160523], [CVE-2020-6612, boo#1160524],
    [CVE-2020-6613, boo#1160525], [CVE-2020-6614, boo#1160526],
    [CVE-2020-6615, boo#1160527]