Log Message:
Update to 6.9.9.11

Changelog:
2017-09-03  6.9.9-11 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-11, GIT revision 11969:a12fbb873:20170903.

2017-08-28  6.9.9-11 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).
  * Don't overwrite symbolic links when the shred policy is enabled.

2017-08-27  6.9.9-10 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-10, GIT revision 11936:a8112a821:20170827.

2017-08-26  6.9.9-10 Dirk Lemstra <dirk@lem.....org>
  * Fixed thread safety issue inside the pango and librsvg decoder
    (reference: https://github.com/dlemstra/Magick.NET/issues/91).

2017-08-20  6.9.9-9 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-9, GIT revision 11915:5205bda17:20170820.

2017-08-18  6.6.9-9 Glenn Randers-Pehrson <glennrp@image...>
  * Fixed bug with writing tIME chunk when timezone has a negative offset
    (reference: https://github.com/ImageMagick/ImageMagick/issues/685).

2017-08-18  6.9.9-8 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-8, GIT revision 11906:26078285f:20170818.

2017-08-18  6.9.9-8 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-08-12  6.9.9-7 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-7, GIT revision 11893:8c4c56a0e:20170812
    (Windows binaries out of sync).

2017-08-10  6.9.9-6 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-6, GIT revision 11886:af2b102db:20170810.

2017-08-10  6.9.9-6 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-08-10  6.9.9-6 Glenn Randers-Pehrson <glennrp@image...>
  * tests/validate.c: Show the reason for failures in the test logs,
    if available.

2017-08-03  6.9.9-6 Glenn Randers-Pehrson <glennrp@image...>
  * Put UTC time in the PNG tIME chunk instead of local time (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32447).

2017-08-02  6.9.9-5 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-5, GIT revision 11858:7a555e53f:20170802.

2017-08-01  6.9.9-5 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-07-29  6.9.9-5 Glenn Randers-Pehrson <glennrp@image...>
  * Properly set image->colorspace in the PNG decoder (previously
    it was setting image->gamma, but only setting image->colorspace
    for grayscale and gray-alpha images.  Reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32418).
  * Fix improper use of NULL in the JNG decoder (CVE-2017-11750, Reference
    https://github.com/ImageMagick/ImageMagick/issues/632).

2017-07-29  6.9.9-5 Cristy  <quetzlzacatenango@image...>
  * Off by one error for gradient coder (reference
    https://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=32416).

2017-07-28  6.9.9-4 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-4, GIT revision 11833:4e81160d6:20170728.

2017-07-25  6.9.9-4 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).
  * coders/png.c: Initialized quantum_scanline to prevent a bad free
    (reference https://github.com/ImageMagick/ImageMagick/issues/621).

2017-07-24  6.9.9-4 Glenn Randers-Pehrson <glennrp@image...>
  * Removed write_chunk_from_profile() from coders/png.c because it
    has not worked at least since version 6.7.6.
  * Removed many redundant checks before RelinquishMagickMemory(),
    which is safe to call with a NULL argument.
  * Removed vpAg chunk write support (we are now writing caNv instead).
  * coders/png.c: Initialized quantum_info to prevent memory leakage
    (reference https://github.com/ImageMagick/ImageMagick/issues/582,
    CVE-2017-11539).
  * coders/png.c: fixed NULL dereference when trying to write an empty MNG
    (CVE-2017-11522, reference
    https://github.com/ImageMagick/ImageMagick/issues/586).

2017-07-24  6.9.9-3 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-3, GIT revision 11809:2bd88257b:20170724.

2017-07-23  6.9.9-3 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-07-23  6.9.9-3 Glenn Randers-Pehrson <glennrp@image...>
  * Fix memory leaks when reading a malformed JNG image:
    https://github.com/ImageMagick/ImageMagick/issues/600).
    https://github.com/ImageMagick/ImageMagick/issues/602).

2017-07-22  6.9.9-2 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-2, GIT revision 11786:21b23bf09:20170722.

2017-07-22  6.9.9-2 Cristy  <quetzlzacatenango@image...>
  * composite -dissolve works again reference
    https://github.com/ImageMagick/ImageMagick/issues/597).

2017-07-21  6.9.9-1 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-1, GIT revision 11782:75f7e994e:20170721.

2017-07-19  6.9.9-1 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).

2017-07-15  6.9.9-1 Glenn Randers-Pehrson <glennrp@image...>
  * Don't write a hex-encoded Exif profile when writing the eXIf chunk.
  * Added caNv, eXIf, and pHYs to the list of PNG chunks to be removed
    by the "-strip" option.

2017-07-15  6.9.9-0 Cristy  <quetzlzacatenango@image...>
  * Release ImageMagick version 6.9.9-0, GIT revision 11738:8903861b2:20170715.

2017-07-13  6.9.9-0 Glenn Randers-Pehrson <glennrp@image...>
  * Implemented PNG eXIf chunk support.

2017-07-08  6.9.9-0 Cristy  <quetzlzacatenango@image...>
  * Fixed numerous memory leaks (reference
    https://github.com/ImageMagick/ImageMagick/issues).
  * Don't use variable float_t / double_t, bump SO (reference
    https://github.com/ImageMagick/ImageMagick/issues/510).
  * Support DNG images with libraw delegate library.