Update Giflib 5.2.1, libtiff 4.0.10, libpng 1.6.37

Author: peirick

README.md

@@ -6,10 +6,10 @@ It contains a *build_tesseract.bat* to build the latest tesseract version.
 A simple *test_tesseract.bat* is available to show how to run OCR on different image fileformats and generate a pdf.
 
 ## Used Libraries
-* [Giflib 5.1.4](http://giflib.sourceforge.net/)
-* [libtiff 4.0.9](http://simplesystems.org/libtiff/)
+* [Giflib 5.2.1](http://giflib.sourceforge.net/)
+* [libtiff 4.0.10](http://simplesystems.org/libtiff/)
 * [zlib 1.2.11](http://www.zlib.net/)
-* [libpng 1.6.34]( http://www.libpng.org/pub/png/libpng.html)
+* [libpng 1.6.37]( http://www.libpng.org/pub/png/libpng.html)
 * [libjpeg 9c](http://ijg.org/)
 * [OpenJPEG 2.3.0](http://www.openjpeg.org/)
 * [jbig2enc 0.28](https://github.com/agl/jbig2enc)

giflib/NEWS

@@ -1,6 +1,105 @@
 			GIFLIB NEWS
 
 
+Version 5.2.1
+==============
+
+This is the "Maybe I shouldn't have dome a release while imn surgical recovery" release.
+
+* In gifbuild.c, avoid a core dump on no color map.
+
+* Restore inadvertently removed library version numbers in Makefile.
+
+Version 5.2.0
+=============
+
+The undocumented and deprecated GifQuantizeBuffer() entry point
+has been moved to the util library to reduce libgif size and attack
+surface. Applications needing this function are couraged to link the
+util library or make their own copy.
+
+The following obsolete utility programs are no longer installed:
+gifecho, giffilter, gifinto, gifsponge. These were either installed in
+error or have been obsolesced by modern image-transformmation tools
+like ImageMagick convert. They may be removed entirely in a future
+release.
+
+* Address SourceForge issue #136: Stack-buffer-overflow in gifcolor.c:84
+
+* Address SF bug #134: Giflib fails to slurp significant number of gifs
+
+* Apply SPDX convention for license tagging.
+
+Version 5.1.9
+=============
+
+The documentation directory now includes an HTMlified version of the
+GIF89 standard, and a more detailed description of how LZW compression
+is applied to GIFs.
+
+* Address SF bug #129: The latest version of giflib cannot be build on windows.
+
+* Address SF bug #126: Cannot compile giflib using c89
+
+Version 5.1.8
+=============
+
+* Address SF bug #119: MemorySanitizer: FPE on unknown address
+
+* Address SF bug #125: 5.1.7: xmlto is still required for tarball
+
+* Address SF bug #124: 5.1.7: ar invocation is not crosscompile compatible
+
+* Address SF bug #122: 5.1.7 installs manpages to wrong directory
+
+* Address SF bug #121: make: getversion: Command not found
+
+* Address SF bug #120: 5.1.7 does not build a proper library - no 
+
+Version 5.1.7
+=============
+
+Correct a minor packaging error (superfluous symlinks) in the 5.1.6 tarballs.
+
+Version 5.1.6
+=============
+
+Build Fixes
+-----------
+
+Fix library installation in the Makefile.
+
+Version 5.1.5
+=============
+
+Code Fixes
+----------
+
+* Fix SF bug #114: Null dereferences in main() of gifclrmp
+
+* Fix SF bug #113: Heap Buffer Overflow-2 in function DGifDecompressLine()
+  in cgif.c.  This had been assigned CVE-2018-11490.
+
+* Fix SF bug #111: segmentation fault in PrintCodeBlock
+
+* Fix SF bug #109: Segmentation fault of giftool reading a crafted file
+
+* Fix SF bug #107: Floating point exception in giftext utility
+
+* Fix SF bug #105: heap buffer overflow in DumpScreen2RGB in gif2rgb.c:317
+
+* Fix SF bug #104: Ineffective bounds check in DGifSlurp
+
+^ Fix SF bug #103: GIFLIB 5.1.4: DGifSlurp fails on empty comment
+
+* Fix SF bug #87: Heap buffer overflow in 5.1.2 (gif2rgb).
+
+Build Fixes
+-----------
+
+The horrible old autoconf build system has been removed with extreme prejudice. 
+You now build this simply by running "make" from the top-level directory.
+
 Version 5.1.4
 =============
 
@@ -186,7 +285,7 @@ Documentation and polish
 
 Retirements
 -----------
-* gifinter is gone.  Use convert -interlace from the ImageMagick suite.
+* gifinter is gone.  Use "convert -interlace line" from the ImageMagick suite.
 
 Code Fixes
 ----------

giflib/README

@@ -16,12 +16,30 @@ RGB bitmaps, and for writing RGB bitmaps as GIF files.
 
 The (permissive) open-source license is in the file COPYING.
 
-You will find build instructions in build.asc
+You will find build instructions in build.adoc
 
 You will find full documentation of the API in doc/ and on the 
 project website.
 
-The project has a long and confusing history, described in history.asc
+Please report bugs to the bug tracker on sourceforge:
+
+http://sourceforge.net/tracker/?group_id=102202
+
+The project has a long and confusing history, described in history.adoc
 
 The project to-do list is in TODO.
 
+== Authors ==
+
+Gershon Elber <gershon[AT]cs.technion.sc.il>
+	original giflib code
+
+Toshio Kuratomi <toshio[AT]tiki-lounge.com>
+        uncompressed gif writing code
+        former maintainer
+
+Eric Raymond <esr[AT]snark.thyrsus.com>
+        current as well as long time former maintainer of giflib code
+
+There have been many other contributors; see the attributions in the
+version-control history to learn more.