`_gdScaleHoriz()` and `_gdScaleVert()` may fail, but don't signal
failure since they are void functions. We change that according to
upstream libgd.
We also remove the unused `Scale()` function, which doesn't exist in
upstream libgd either, right away.
Add MUL back to the list and instead make the entire optimization
depend on IGNORE_OVERLOADING, which is there exactly so we can make
these kinds of assumptions.
* PHP-7.2:
Fix bug #77418 - Heap overflow in utf32be_mbc_to_code
Add NEWS
[ci skip] Add NEWS
Fix more issues with encodilng length
Fix#77270: imagecolormatch Out Of Bounds Write on Heap
Fix bug #77380 (Global out of bounds read in xmlrpc base64 code)
Fix bug #77371 (heap buffer overflow in mb regex functions - compile_string_node)
Fix bug #77370 - check that we do not read past buffer end when parsing multibytes
Fix#77269: Potential unsigned underflow in gdImageScale
Fix bug #77247 (heap buffer overflow in phar_detect_phar_fname_ext)
Fix bug #77242 (heap out of bounds read in xmlrpc_decode())
Regenerate certs for openssl tests
* PHP-7.1:
Fix bug #77418 - Heap overflow in utf32be_mbc_to_code
Add NEWS
[ci skip] Add NEWS
Fix more issues with encodilng length
Fix#77270: imagecolormatch Out Of Bounds Write on Heap
Fix bug #77380 (Global out of bounds read in xmlrpc base64 code)
Fix bug #77371 (heap buffer overflow in mb regex functions - compile_string_node)
Fix bug #77370 - check that we do not read past buffer end when parsing multibytes
Fix#77269: Potential unsigned underflow in gdImageScale
Fix bug #77247 (heap buffer overflow in phar_detect_phar_fname_ext)
Fix bug #77242 (heap out of bounds read in xmlrpc_decode())
Regenerate certs for openssl tests
* PHP-5.6:
Fix bug #77418 - Heap overflow in utf32be_mbc_to_code
[ci skip] Add NEWS
Fix more issues with encodilng length
Fix#77270: imagecolormatch Out Of Bounds Write on Heap
Fix bug #77380 (Global out of bounds read in xmlrpc base64 code)
Fix bug #77371 (heap buffer overflow in mb regex functions - compile_string_node)
Fix bug #77370 - check that we do not read past buffer end when parsing multibytes
Fix#77269: Potential unsigned underflow in gdImageScale
Fix bug #77247 (heap buffer overflow in phar_detect_phar_fname_ext)
Fix bug #77242 (heap out of bounds read in xmlrpc_decode())
Regenerate certs for openssl tests