SHA-3 Keccak_Hash: Store Keccak_HashInstance in the main context.

Previously, the Keccak_HashInstance was separately allocated.
This could cause memory leaks on errors. For instance,

SHA-3 Keccak_Hash: Store Keccak_HashInstance in the main context.

Previously, the Keccak_HashInstance was separately allocated.
This could cause memory leaks on errors. For instance,
in php_hash_do_hash_hmac, the following code cleans up after
a file read error:

if (n < 0) {
efree(context);
efree(K);
zend_string_release(digest);
RETURN_FALSE;
}

This does not call the context's hash_final operation, which
was the only way to free the separately-allocated Keccak state.

The simplest fix is simply to place the Keccak_HashInstance state
inside the context object. Then it doesn't need to be freed.

As a result, there is no need to call hash_final in the
HashContext destructor: HashContexts cannot contain internally
allocated resources.

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Fix UNKNOWN default values in various extensions

Closes GH-5514

Improve a last couple of argument error messages

Closes GH-5404

Generate method entries from stubs for a couple of extensions

Closes GH-5368

Inline a ZEND_NUM_ARGS() variable

Generate functions entries from stubs for another set of extensions

Closes GH-5351

Improve error messages of ext/hash

Closes GH-5275

Promote warnings to exceptions in ext/hash

Add arginfo for HashContext::__construct()

Arginfo was already generated, just not referenced.

Fix #78880 Another round

Make error messages more consistent by fixing capitalization

Closes GH-5066 As a first step, let's capitalize their initial letter when it is applicable.

Switch hash() function to use fastzpp

For short inputs ZPP can be a large fraction of the hash()
execution time.

Switch php_hash_fetch_ops() to use zend_string

This has two advantages: If the string is already lowercase, we
do not need to copy it, and it will hopefully match the interned
string

Switch php_hash_fetch_ops() to use zend_string

This has two advantages: If the string is already lowercase, we
do not need to copy it, and it will hopefully match the interned
string name of the hash, making the comparison more efficient.

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Use RETURN_THROWS() after zend_throw_error()

Use RETURN_THROWS() after zend_type_error()

Use ZEND_THROWS() during ZPP in the GD, gettext, GMP, and hash extensions

Fix smaller issues with stubs

GH-5025

Cleanup return values when parameter parsing is unsuccessful

Add missing zend_parse_parameters_none() checks

Closes GH-4796.

Remove mention of PHP major version in Copyright headers

Closes GH-4732.

Add stubs for ext-hash

Add missing ZPP_none()

Remove duplicate md5/sha1 implementation

This code was actually unused since its introduction, and since at
least the md5 implementation in the core was completely overhauled,
we're

Remove duplicate md5/sha1 implementation

This code was actually unused since its introduction, and since at
least the md5 implementation in the core was completely overhauled,
we're dropping the md5 and sha1 related stuff from ext/hash.

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Warnings to Errors hash_equals

Errorfy hash_pbkdf2