[devel] Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco

to put png.h and pngconf.h in $prefix/include, like the other scripts,
instead of in $prefix/include/libpng.  Also revised makefile.sco
to put them in $prefix/include/libpng12 instead of in
$prefix/include/libpng/libpng12.

CHANGES

diff --git a/CHANGES b/CHANGES
index cff1781..106bad8 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2409,6 +2409,11 @@
   Updated README
   Added "#define PNG_NO_PEDANTIC_WARNINGS" in the libpng source files.
   Removed "-DPNG_CONFIGURE_LIBPNG" from the makefiles and projects.
+  Revised scripts/makefile.netbsd, makefile.openbsd, and makefile.sco
+    to put png.h and pngconf.h in $prefix/include, like the other scripts,
+    instead of in $prefix/include/libpng.  Also revised makefile.sco
+    to put them in $prefix/include/libpng12 instead of in
+    $prefix/include/libpng/libpng12.
 
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