Imported from libpng-1.0.9rc2.tar
diff --git a/png.h b/png.h
index dd6c725..1dbfd4d 100644
--- a/png.h
+++ b/png.h
@@ -1,15 +1,15 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.0.9beta9 - January 15, 2001
- * Copyright (c) 1998, 1999, 2000, 2001 Glenn Randers-Pehrson
+ * libpng version 1.0.9rc2 - January 22, 2001
+ * Copyright (c) 1998-2001 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
  * Authors and maintainers:
  *  libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *  libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *  libpng versions 0.97, January 1998, through 1.0.9beta9 - January 15, 2001: Glenn
+ *  libpng versions 0.97, January 1998, through 1.0.9rc2 - January 22, 2001: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -52,20 +52,22 @@
  *    1.0.6h                        10007  10.6h (testing xy.z so-numbering)
  *    1.0.6i                        10007  10.6i
  *    1.0.6j                        10007  2.1.0.6j (incompatible with 1.0.0)
- *    1.0.7beta11-18                10007  2.1.0.7beta11-18 (binary compatible)
- *    1.0.7rc1-2                    10007  2.1.0.7rc1-2 (binary compatible)
- *    1.0.7                         10007  (still compatible)
- *    1.0.8beta1-4                  10008  2.1.0.8beta1-4
- *    1.0.8rc1                      10008  2.1.0.8rc1
- *    1.0.8                         10008  2.1.0.8
- *    1.0.9beta1-6                  10009  2.1.0.9beta1-6
- *    1.0.9rc1                      10009  2.1.0.9rc1
- *    1.0.9beta7-9                  10009  2.1.0.9beta7-9
+ *    1.0.7beta11-14        DLLNUM  10007  2.1.0.7beta11-14 (binary compatible)
+ *    1.0.7beta15-18           1    10007  2.1.0.7beta15-18 (binary compatible)
+ *    1.0.7rc1-2               1    10007  2.1.0.7rc1-2 (binary compatible)
+ *    1.0.7                    1    10007  (still compatible)
+ *    1.0.8beta1-4             1    10008  2.1.0.8beta1-4
+ *    1.0.8rc1                 1    10008  2.1.0.8rc1
+ *    1.0.8                    1    10008  2.1.0.8
+ *    1.0.9beta1-6             1    10009  2.1.0.9beta1-6
+ *    1.0.9rc1                 1    10009  2.1.0.9rc1
+ *    1.0.9beta7-10            1    10009  2.1.0.9beta7-10
+ *    1.0.9rc2                 1    10009  2.1.0.9rc2
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
  *    used for changes in backward compatibility, as it is intended.  The
- *    PNG_PNGLIB_VER macro, which is not used within libpng but is available
+ *    PNG_LIBPNG_VER macro, which is not used within libpng but is available
  *    for applications, is an unsigned integer of the form xyyzz corresponding
  *    to the source version x.y.z (leading zeros in y and z).  Beta versions
  *    were given the previous public release number plus a letter, until
@@ -76,6 +78,9 @@
  *    to the info_ptr or png_ptr members through png.h, and the compiled
  *    application is loaded with a different version of the library.
  *
+ *    DLLNUM will change each time there are forward or backward changes
+ *    in binary compatibility (e.g., when a new feature is added).
+ *
  * See libpng.txt or libpng.3 for more information.  The PNG specification
  * is available as RFC 2083 <ftp://ftp.uu.net/graphics/png/documents/>
  * and as a W3C Recommendation <http://www.w3.org/TR/REC.png.html>
@@ -87,7 +92,7 @@
  * If you modify libpng you may insert additional notices immediately following
  * this sentence.
  *
- * libpng versions 1.0.7, July 1, 2000, through  1.0.9beta9, January 15, 2001, are
+ * libpng versions 1.0.7, July 1, 2000, through  1.0.9rc2, January 22, 2001, are
  * Copyright (c) 2000, 2001 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.0.6
  * with the following individuals added to the list of Contributing Authors
@@ -192,13 +197,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    January 15, 2001
+ *    January 22, 2001
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.0.9beta9 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.0.9rc2 are Y2K compliant.  It is my belief that earlier
  *    versions were also Y2K compliant.
  *
  *    Libpng only has three year fields.  One is a 2-byte unsigned integer
@@ -254,9 +259,10 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.0.9beta9"
+#define PNG_LIBPNG_VER_STRING "1.0.9rc2"
 
 #define PNG_LIBPNG_VER_SONUM   2
+#define PNG_LIBPNG_VER_DLLNUM  %DLLNUM%
 
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
@@ -265,7 +271,7 @@
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
 
-#define PNG_LIBPNG_VER_BUILD  9
+#define PNG_LIBPNG_VER_BUILD  2
 
 #define PNG_LIBPNG_BUILD_ALPHA    1
 #define PNG_LIBPNG_BUILD_BETA     2
@@ -273,7 +279,7 @@
 #define PNG_LIBPNG_BUILD_STABLE   4
 #define PNG_LIBPNG_BUILD_TYPEMASK 7
 #define PNG_LIBPNG_BUILD_PATCH    8 /* Can be OR'ed with STABLE only */
-#define PNG_LIBPNG_BUILD_TYPE 2
+#define PNG_LIBPNG_BUILD_TYPE 3
 
 /* Careful here.  At one time, Guy wanted to use 082, but that would be octal.
  * We must not include leading zeros.
@@ -1172,9 +1178,9 @@
 
 
 /* This prevents a compiler error in png_get_copyright() in png.c if png.c
-and png.h are both at * version 1.0.9beta9
+and png.h are both at * version 1.0.9rc2
  */
-typedef png_structp version_1_0_9beta9;
+typedef png_structp version_1_0_9rc2;
 
 typedef png_struct FAR * FAR * png_structpp;
 
@@ -2214,13 +2220,15 @@
    png_ptr, png_uint_32 mng_features_permitted));
 #endif
 
+#if 0 /* delay these until version 1.2.0 */
 /* png.c, pnggccrd.c, or pngvcrd.c */
 extern PNG_EXPORT(int,png_mmx_support) PNGARG((void));
+#endif
 
 /* Maintainer: Put new public prototypes here ^, in libpng.3, and project defs */
 
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.0.9beta9 - January 15, 2001 (header)\n"
+   " libpng version 1.0.9rc2 - January 22, 2001 (header)\n"
 
 #ifdef PNG_READ_COMPOSITE_NODIV_SUPPORTED
 /* With these routines we avoid an integer divide, which will be slower on