Do not generate frameless info items when func info generation is disabled

While here, I fixed newlines around arginfo and function entry generation. Previously, newlines were repeated.

Use single line phpdoc in stubs where possible

Not serializable flag permeation

Declare tentative return types for ext/curl

Relates to GH-6985

Use typed properties in ext/curl

Improve class entry generation

Related to GH-6701

cURL: make possible to send file from buffer string

Add CURLStringFile class which works similarly to CURLFile, but
uploads a file from a string rather than a file. This avoids the
n

cURL: make possible to send file from buffer string

Add CURLStringFile class which works similarly to CURLFile, but
uploads a file from a string rather than a file. This avoids the
need to create a temporary file, or use of a data:// stream.

Basic usage:

$file = new CURLStringFile($data, 'filename.txt', 'text/plain');
curl_setopt($curl, CURLOPT_POSTFIELDS, ['file' => $file]);

Closes GH-6456.

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Implicitly enable function entry generation when class entry generation is enabled

Closes GH-6675

Add support for generating class entries from stubs

Closes GH-6289

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

Improve parameter names in ext/curl

Closes GH-6155

Include stub hash in generated arginfo files

The hash is used to check whether the arginfo file needs to be
regenerated. PHP-Parser will only be downloaded if this is actually
necess

Include stub hash in generated arginfo files

The hash is used to check whether the arginfo file needs to be
regenerated. PHP-Parser will only be downloaded if this is actually
necessary.

This ensures that release artifacts will never try to regenerate
stubs and thus fetch PHP-Parser, as long as you do not modify any
files.

Closes GH-5739.

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Fix UNKNOWN default values in ext/curl

Closes GH-5734

Generate method entries from stubs for curl, ffi, pdo, phar

Closes GH-5375

Add Curl ext PHP stubs

Closes GH-4557.