Use a single version of mempcpy(3) (#12257)

While __php_mempcpy is only used by ext/standard/crypt_sha*, the
mempcpy "pattern" is used everywhere.

This commit removes __php_memp

Use a single version of mempcpy(3) (#12257)

While __php_mempcpy is only used by ext/standard/crypt_sha*, the
mempcpy "pattern" is used everywhere.

This commit removes __php_mempcpy, adds zend_mempcpy and transforms
open-coded parts into function calls.

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Follow up on #8897 but on master which instead does not use the old custom alloca.
Closes #8905.

Revert "Merge branch 'PHP-8.1'"

This reverts commit 6876c202ea08cac1a05a0461a677e45ea669692e, reversing
changes made to a1934273337ed68ec8eddf714c34631f0b23bdfe.

Merge branch 'PHP-8.1'

Merge branch 'PHP-8.0' into PHP-8.1

Fix the crypt sha apis build (with recent clang versions).

Removing the said subtraction by casting instead.
While at it fixing werror level on phpdbg too.

Closes #8897.

Remove custom alloca() (#8513)

* Use arena in DCE instead of multiple alloca()
This requires passing the optimizer context

* Use our do_alloca() instead of alloca()

*

Remove custom alloca() (#8513)

* Use arena in DCE instead of multiple alloca()
This requires passing the optimizer context

* Use our do_alloca() instead of alloca()

* Use emalloc in DEBUG builds instead of stack allocations for do_alloca()
This helps detecting that we correctly free do_alloca()

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Replace zend_bool uses with bool

We're starting to see a mix between uses of zend_bool and bool.
Replace all usages with the standard bool type everywhere.

Of course, zend_bool

Replace zend_bool uses with bool

We're starting to see a mix between uses of zend_bool and bool.
Replace all usages with the standard bool type everywhere.

Of course, zend_bool is retained as an alias.

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Enforce min/max rounds in sha256/sha512 crypt

This brings our implementation in line with glibc behavior.

Remove HAVE_STRING_H

The C89 standard and later defines the `<string.h>` header as part of
the standard headers [1] and on current systems it is always present.

Code included al

Remove HAVE_STRING_H

The C89 standard and later defines the `<string.h>` header as part of
the standard headers [1] and on current systems it is always present.

Code included also `<strings.h>` header as an alterinative in some
files. This kind of check was relevant on some older systems where the
`<strings.h>` file included definitions for the C89 compliant
`<string.h>`. Today such alternative check is not required anymore. The
`<strings.h>` file is part of the POSIX definition these days.

Also Autoconf suggests doing this and relying on C89 or above [2] and [3].

This patch also cleans few unused `<strings.h>` inclusions in the libmbfl.

[1]: https://port70.net/~nsz/c/c89/c89-draft.html#4.1.2
[2]: http://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/headers.m4
[3]: https://www.gnu.org/software/autoconf/manual/autoconf-2.69/autoconf.html

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Reuse new alignment macros

Fixed condition check

fix thread safety

fix datatype mismatches

refixed printf fmt, used portable macros

fix printf format

generalized the case with secure memory zeroing

zero sensitive data more secure way

master renames phase 3

master renames phase 1

mostly fixes to spl, but also some other

unify stdint type usage

if you need C99 stdint types, just include "php_stdint.h"

fix salt truncation bug in sha256

Fixed bug relating to un-initialized memory access

Fixed compiler warnings in the standard library