libpng-1.6.35 released

Here is the list of changes since the last public release (1.6.34):

• Restored 21 of the contrib/pngsuite/i*.png, which do not cause test failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png.
• Added calls to png_set_*() transforms commonly used by browsers to the fuzzer.
• Removed some unnecessary brackets in pngrtran.c
• Fixed miscellaneous typos (Patch by github user "luzpaz").
• Change "ASM C" to "C ASM" in CMakeLists.txt
• Fixed incorrect handling of bKGD chunk in sub-8-bit files
• Added hardware optimization directories to zip and 7z distributions.
• Fixed incorrect bitmask for options.
• Fixed many spelling typos.
• Make png_get_iCCP consistent with man page (allow compression-type argument to be NULL, bug report by Lenard Szolnoki).
• Replaced the remaining uses of png_size_t with size_t
• Fixed the calculation of row_factor in png_check_chunk_length (reported by Thuan Pham in SourceForge issue #278)
• Added missing parentheses to a macro definition (suggested by "irwir" in GitHub issue #216)