Fixes to GH-14078:
* Rename ZipArchive::openBuffer() to ::openString().
* For consistency with ::open(), return int|bool, don't throw an
exception on error. Provide error information via existing properties
and accessors.
* Fix memory leak when ::openString() is called but ::close() is not
called. Add test.
* Fix memory leak when a call to ::open() is followed by a call to
::openString(). Add test.
* Let libzip own the source, don't call zip_source_keep().
* Share buffer handling with ZipArchive::addFromString().
Elsewhere:
* If there is an error from zip_close() during a call to
ZipArchive::open(), emit a warning but proceed to open the archive,
don't return early. Add test.
* When buffers are saved by ZipArchive::addFromString(), release them
in ZipArchive::close() and ::open(), don't accumulate buffers until
the free_obj handler is called.
* Factor out buffer handling and reuse it in ZipArchive::openString()
Closes GH-21205.
Closes GH-14078.
Co-authored-by: Soner Sayakci <s.sayakci@shopware.com>
Co-authored-by: Ghaith Olabi <24876890+Gaitholabi@users.noreply.github.com>
