Implement high resolution monotonic timer function hrtime()

Added entry on UPGRADING

Add _IS_NUMBER as cast_object() target type

convert_scalar_to_number() will now call cast_object() with an
_IS_NUMBER argument, in which case the cast handler should return
either an

Add _IS_NUMBER as cast_object() target type

convert_scalar_to_number() will now call cast_object() with an
_IS_NUMBER argument, in which case the cast handler should return
either an integer or floating point number, whichever is more
appropriate.

Previously convert_scalar_to_number() unconditionally converted
objects to integers instead.

Fixes bug #53033.
Fixes bug #54973.
Fixes bug #73108.

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Fixed bug #54043

Bump libcurl requirement to 7.12.1

The existence of the following functions is now guaranteed:
* curl_reset()
* curl_strerror()
* curl_multi_strerror()
* curl_share_strer

Bump libcurl requirement to 7.12.1

The existence of the following functions is now guaranteed:
* curl_reset()
* curl_strerror()
* curl_multi_strerror()
* curl_share_strerror()

libcurl 7.12.1 has been released more than 13 years ago and is
available even in RHEL 4.

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Remove opcache.inherited_hack

This ini directive has already been ignored since PHP 5.3.

Document removal of opcache.fast_shutdown

[ci skip]

Fix duplicate NEWS entry

Also add an UPGRADING note while at it, as this is potentially
BC breaking.

[ci skip]

Add gmp_kronecker()

Exposes the mpz_kronecker(), mpz_si_kronecker() and
mpz_kronecher_si() for computing the Kronecker symbol.

Add gmp_perfect_power()

Exposes the mpz_perfect_power_p() function.

We already had the more specific gmp_perfect_square() function.

Add gmp_lcm()

Exposes mpz_lcm() and mpz_lcm_ui() for calculating the least
common multiple.

We already expose the somewhat complementary gmp_gcd() function.

Add gmp_binomial()

Adds PHP bindings for mpz_bin_ui and mpz_bin_uiui, for calculating
binomial coefficients.

Implement list() reference assignments

Support list() reference assignments of the form:

list(&$a, list(&$b, $c)) = $d;

RFC: https://wiki.php.net/rfc/list_reference_ass

Implement list() reference assignments

Support list() reference assignments of the form:

list(&$a, list(&$b, $c)) = $d;

RFC: https://wiki.php.net/rfc/list_reference_assignment

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Fixed bug #74372

Fix typo in UPGRADING, should be oci_unregister_taf_callback

See de65a2243f5e52ccafc69889ab0b64f4481c5358 which exposes
the unregister functionality.

[ci skip]

Mention spl_object_id in UPGRADING notes

This was implemented in PR #2611

Note to UPGRADING about Spoofchecker::setRestrictionLevel()

Merge JSON_THROW_ON_ERROR

Refactored recursion pretection

[ci skip] hash_hmac_algos() is new in PHP 7.2.0

[ci skip] Fix more typos in UPGRADING

[ci skip] Update UPGRADING wrt. PR 2742

[ci skip] Fix typos in UPGRADING

[ci-skip] Add missing UPGRADING entry for commit 0d0f7cd

There is a respective entry in NEWS, but that would likely be missed by
the doc team.

Fixed bug #75170

This change may result in different mt_rand/rand sequences being
generated on 64-bit systems for a specific seed.

See also https://externals.io/message/100229.