handle chunks even when they have been tagged PNG_HANDLE_CHUNK_NEVER.

trouble with CRLF line endings.

Revised scripts/makefile.freebsd to respect ZLIBDIR and ZLIBINC.

option:
    --enable-arm-neon=always will stop the run-time checks. New checks
    within arm/arm_init.c will cause the code not to be compiled unless
    __ARM_NEON__ is set. This should make it fail safe (if someone asks
    for it on then the build will fail if it can't be done.)
Fixed ALIGNED_MEMORY support.

Folded some long lines.

Linux/POSIX 1003.1 API to check /proc/self/auxv avoiding buffer allocation
and other library calls (ported from libpng15).

directory while building with a parallel make.

which demonstrates the tokenization problem previously avoided by using /lib/cpp.
Since all .dfn output is now protected in double quotes unless it is to be macro
substituted the fix should work everywhere.

to be included for preprocessor definitions only, so it can be used in non-C/C++
files. Back ported from libpng 1.7.

in #ifdef PNG_GET_PALETTE_MAX_SUPPORTED block, and revised pnglibconf.h
and pnglibconf.h.prebuilt accordingly.