Promote warnings to exceptions in ext/curl

Closes GH-5963

Remove proto comments from C files

Closes GH-5758

Add flag to forbid dynamic property creation on internal classes

While performing resource -> object migrations, we're adding
defensive classes that are final, non-serializable and non-c

Add flag to forbid dynamic property creation on internal classes

While performing resource -> object migrations, we're adding
defensive classes that are final, non-serializable and non-clonable
(unless they are, of course). This path adds a ZEND_ACC_NO_DYNAMIC_PROPERTIES
flag, that also forbids the creation of dynamic properties on these objects.
This is a subset of #3931 and targeted at internal usage only
(though may be extended to userland at some point in the future).

It's already possible to achieve this (what the removed
WeakRef/WeakMap code does), but there's some caveats: First, this
simple approach is only possible if the class has no declared
properties, otherwise it's necessary to special-case those
properties. Second, it's easy to make it overly strict, e.g. by
forbidding isset($obj->prop) as well. And finally, it requires a
lot of boilerplate code for each class.

Closes GH-5572.

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Also allow casting CurlMultiHandles

Convert CURL resources to objects

Closes GH-5402

Co-authored-by: Nikita Popov <nikita.ppv@gmail.com>

Fix [-Wundef] warning in cURL extension

Bump required libcurl version to 7.29.0

libcurl 7.29.0 has been released almost eight years ago, so this
version is supposed to be available practically everywhere. This bump
also a

Bump required libcurl version to 7.29.0

libcurl 7.29.0 has been released almost eight years ago, so this
version is supposed to be available practically everywhere. This bump
also allows us to get rid of quite some conditional code and tests
catering to very old libcurl versions.

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Merge branch 'PHP-7.4'

* PHP-7.4:
Fix #79078: Hypothetical use-after-free in curl_multi_add_handle()

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fix #79078: Hypothetical use-after-free in curl_multi_add_handle()

Fix #79078: Hypothetical use-after-free in curl_multi_add_handle()

To avoid this, we have to verify the handlers already in
`curl_multi_add_handle()`, not only in `curl_multi_exec()`.

Use RETURN_THROWS() after zend_fetch_resource*()

Cleanup return values when parameter parsing is unsuccessful

Remove mention of PHP major version in Copyright headers

Closes GH-4732.

Remove some misleading RETURN_FALSE

These functions throw, so they can't return false.

This is just a subset...

Merge branch 'PHP-7.3' into PHP-7.4

Merge branch 'PHP-7.2' into PHP-7.3

Fixed bug #77946

Save multi_info_read() result into easy handle.

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fix precedence issue causing sub-second timeouts to be 0 in curl_multi_select

Merge branch 'PHP-7.2' into PHP-7.3

* PHP-7.2:
Fix precedence issue causing sub-second timeouts to be 0 in curl_multi_select

Fix precedence issue causing sub-second timeouts to be 0 in
curl_multi_select

Deprecate CURLPIPE_HTTP1

`CURLPIPE_HTTP1` is deprecated and has no effect as of cURL 7.62.0[1].
We therefore deprecate the PHP constant as well, and trigger a warning
that it is no l

Deprecate CURLPIPE_HTTP1

`CURLPIPE_HTTP1` is deprecated and has no effect as of cURL 7.62.0[1].
We therefore deprecate the PHP constant as well, and trigger a warning
that it is no longer supported, if used against cURL 7.62.0 and up.

[1] <https://curl.haxx.se/libcurl/c/CURLMOPT_PIPELINING.html>

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Fix comment

0x2d == 45, not 46. However, `CURLMOPT_PUSHFUNCTION` is actually
available as of cURL 7.44.0[1], while we make the respective PHP
constants available only as of cURL 7.4

Fix comment

0x2d == 45, not 46. However, `CURLMOPT_PUSHFUNCTION` is actually
available as of cURL 7.44.0[1], while we make the respective PHP
constants available only as of cURL 7.46.0[2].

[1] <https://curl.haxx.se/libcurl/c/CURLMOPT_PUSHFUNCTION.html>
[2] <http://git.php.net/?p=php-src.git;a=blob;f=ext/curl/interface.c;h=fdf855278eef6f32f26c49b54f56aca9bd7007c3;hb=HEAD#l1289>

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Use ZEND_TRY_ASSIGN_REF_... macros for arguments passed to internal function by reference

Merge branch 'PHP-7.3' into PHP-7.4

Merge branch 'PHP-7.2' into PHP-7.3