Rename HAVE_DECL_ARC4RANDOM_BUF to HAVE_ARC4RANDOM_BUF (#14565)

AC_CHECK_DECLS defines HAVE_DECL_ARC4RANDOM_BUF to 0 or 1. On Windows
this isn't defined to 0. To avoid the undefined stat

Rename HAVE_DECL_ARC4RANDOM_BUF to HAVE_ARC4RANDOM_BUF (#14565)

AC_CHECK_DECLS defines HAVE_DECL_ARC4RANDOM_BUF to 0 or 1. On Windows
this isn't defined to 0. To avoid the undefined state, the AC_CHECK_DECL
is used to manually define the HAVE_ARC4RANDOM_BUF to 1 if declaration
is found, otherwise undefined.

In the future on current platforms, also AC_CHECK_FUNCS can be used
instead since the arc4random_buf is located in default libraries (C)
with declaration available in headers.

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Sync #if/ifdef/defined (#14520)

These are either undefined or defined (to value 1):
- __DragonFly__
- __FreeBSD__
- HAS_MCAST_EXT
- HAVE_GETCWD
- HAVE_GETWD
- HAVE_GL

Sync #if/ifdef/defined (#14520)

These are either undefined or defined (to value 1):
- __DragonFly__
- __FreeBSD__
- HAS_MCAST_EXT
- HAVE_GETCWD
- HAVE_GETWD
- HAVE_GLIBC_ICONV
- HAVE_JIT
- HAVE_LCHOWN
- HAVE_NL_LANGINFO
- HAVE_RL_CALLBACK_READ_CHAR
- HAVE_RL_ON_NEW_LINE
- HAVE_SQL_EXTENDED_FETCH
- HAVE_UTIME

Follow up of GH-5526 (-Wundef)

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Sync #if/ifdef/defined (#14508)

This syncs CPP macro conditions:
- _WIN32
- _WIN64
- HAVE_ALLOCA_H
- HAVE_ALPHASORT
- HAVE_ARPA_INET_H
- HAVE_CONFIG_H
- HAVE_DIRE

Sync #if/ifdef/defined (#14508)

This syncs CPP macro conditions:
- _WIN32
- _WIN64
- HAVE_ALLOCA_H
- HAVE_ALPHASORT
- HAVE_ARPA_INET_H
- HAVE_CONFIG_H
- HAVE_DIRENT_H
- HAVE_DLFCN_H
- HAVE_GETTIMEOFDAY
- HAVE_LIBDL
- HAVE_POLL_H
- HAVE_PWD_H
- HAVE_SCANDIR
- HAVE_SYS_FILE_H
- HAVE_SYS_PARAM_H
- HAVE_SYS_SOCKET_H
- HAVE_SYS_TIME_H
- HAVE_SYS_TYPES_H
- HAVE_SYS_WAIT_H
- HAVE_UNISTD_H
- PHP_WIN32
- ZEND_WIN32

These are either undefined or defined to 1 in Autotools and Windows.

Follow up of GH-5526 (-Wundef).

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Sync #if/ifdef/defined (#14371)

These are either undefined or defined to value 1 in Autotools and
Windows:
- HAVE_COMMONCRYPTO_COMMONRANDOM_H
- HAVE_EXIF
- HAVE_FOPENCOOKIE

Sync #if/ifdef/defined (#14371)

These are either undefined or defined to value 1 in Autotools and
Windows:
- HAVE_COMMONCRYPTO_COMMONRANDOM_H
- HAVE_EXIF
- HAVE_FOPENCOOKIE
- HAVE_IF_NAMETOINDEX
- HAVE_LIBICONV
- HAVE_SOCKETS
- HAVE_STRUCT_STAT_ST_RDEV
- HAVE_STRUCT_TM_TM_GMTOFF
- HAVE_STRUCT_TM_TM_ZONE

Follow up of GH-5526 (-Wundef)

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random: Make php_random_bytes() useable early during engine startup (#14291)

php_random_bytes() can now be used before RANDOM_G() is initialized

rudimentary midipix port (#13896)

random: Move CSPRNG API into php_random_csprng.h (#13290)

This allows consumers of just the CSPRNG to include a much smaller header. It
also allows to verify at a glance whether a source

random: Move CSPRNG API into php_random_csprng.h (#13290)

This allows consumers of just the CSPRNG to include a much smaller header. It
also allows to verify at a glance whether a source file might use non-secure
randomness.

This commit includes the new header wherever the CSPRNG is used, possibly
replacing the inclusion of php_random.h if nothing else is used, but also
includes it in the main php_random.h header for compatibility.

Somewhat related to 45f8cfaf104f504340b0073b9736bb50a88d70a1,
2b30f18708b4f73d2c1d29d3a92a606ebdc5ac4c, and
b14dd85dca3b67a5462f5ed9b6aa0dc22beb615c.

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Remove includes

random: Fix return type of php_random_(bytes|int) (#10687)

These return a `zend_result`, not `int`.

random: Move the CSPRNG implementation into a separate C file (#10668)

The CSPRNG is a delicate and security relevant piece of code and having it in
the giant random.c makes it much hard

random: Move the CSPRNG implementation into a separate C file (#10668)

The CSPRNG is a delicate and security relevant piece of code and having it in
the giant random.c makes it much harder to verify changes to it. Split it into
a separate file.

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