We can't guarantee that the library didn't define Objective-C classes
that still have lingering references, resulting in warnings such as:

 Attempt to use unknown class 0x10e52e110.

And possibly crashes such as:

 thread autodesk-forks#1, queue = 'com.apple.main-thread'
    frame #0: 0x00007fff203829ee libsystem_kernel.dylib`__ulock_wait + 10
    frame autodesk-forks#1: 0x00007fff203fa0c5 libsystem_platform.dylib`_os_unfair_lock_lock_slow + 162
    frame autodesk-forks#2: 0x00007fff2026226b libobjc.A.dylib`unmap_image + 85
    frame autodesk-forks#3: 0x000000010001e11f dyld`dyld::removeImage(ImageLoader*) + 557
    frame autodesk-forks#4: 0x000000010002291d dyld`dyld::garbageCollectImages() + 956
    frame autodesk-forks#5: 0x000000010002e35d dyld`dlclose + 191
    frame autodesk-forks#6: 0x00007fff203cf1c9 libdyld.dylib`dlclose + 183
    frame autodesk-forks#7: 0x0000000103f9f2f1 libQt6Core_debug.6.dylib`QLibraryPrivate::unload_sys(this=0x000000011ba2c7d0) at qlibrary_unix.cpp:294:9
    frame autodesk-forks#8: 0x0000000103f93f3f libQt6Core_debug.6.dylib`QLibraryPrivate::unload(this=0x000000011ba2c7d0, flag=UnloadSys) at qlibrary.cpp:614:36
    frame autodesk-forks#9: 0x0000000103f971fb libQt6Core_debug.6.dylib`QLibraryStore::cleanup() at qlibrary.cpp:425:22
    frame autodesk-forks#10: 0x0000000103f970f9 libQt6Core_debug.6.dylib`qlibraryCleanup() at qlibrary.cpp:447:5
    frame autodesk-forks#11: 0x0000000103f970d1 libQt6Core_debug.6.dylib`(anonymous namespace)::qlibraryCleanup_dtor_class_::~qlibraryCleanup_dtor_class_(this=0x00000001041edd38) at qlibrary.cpp:449:1
    frame autodesk-forks#12: 0x0000000103f930f5 libQt6Core_debug.6.dylib`(anonymous namespace)::qlibraryCleanup_dtor_class_::~qlibraryCleanup_dtor_class_(this=0x00000001041edd38) at qlibrary.cpp:449:1
    frame autodesk-forks#13: 0x00007fff202e5d25 libsystem_c.dylib`__cxa_finalize_ranges + 316
    frame qt#14: 0x00007fff202e6010 libsystem_c.dylib`exit + 53
    frame qt#15: 0x00007fff203d1f44 libdyld.dylib`start + 8
    frame qt#16: 0x00007fff203d1f3d libdyld.dylib`start + 1

  thread autodesk-forks#5, queue = 'com.apple.root.user-interactive-qos', stop reason = signal SIGABRT
    frame #0: 0x00007fff203a356e libsystem_kernel.dylib`__abort_with_payload + 10
    frame autodesk-forks#1: 0x00007fff203a4fbd libsystem_kernel.dylib`abort_with_payload_wrapper_internal + 80
    frame autodesk-forks#2: 0x00007fff203a4f6d libsystem_kernel.dylib`abort_with_reason + 19
    frame autodesk-forks#3: 0x00007fff202749e3 libobjc.A.dylib`_objc_fatalv(unsigned long long, unsigned long long, char const*, __va_list_tag*) + 114
    frame autodesk-forks#4: 0x00007fff20274971 libobjc.A.dylib`_objc_fatal(char const*, ...) + 135
    frame autodesk-forks#5: 0x00007fff20255ccb libobjc.A.dylib`lookUpImpOrForward + 881
    frame autodesk-forks#6: 0x00007fff2025539b libobjc.A.dylib`_objc_msgSend_uncached + 75
    frame autodesk-forks#7: 0x00007fff22f368d6 AppKit`-[_NSWindowTransformAnimation setCurrentProgress:] + 42
    frame autodesk-forks#8: 0x00007fff22f37a8a AppKit`__55-[NSAnimation(NSInternal) _advanceTimeWithDisplayLink:]_block_invoke + 31
    frame autodesk-forks#9: 0x00007fff22d0774f AppKit`NSPerformVisuallyAtomicChange + 132
    frame autodesk-forks#10: 0x00007fff22f379dc AppKit`-[NSAnimation(NSInternal) _advanceTimeWithDisplayLink:] + 172
    frame autodesk-forks#11: 0x00007fff22e9a184 AppKit`-[NSScreenDisplayLink _fire] + 180
    frame autodesk-forks#12: 0x00007fff2362f0b4 AppKit`___NSRunLoopTimerCreateWithHandler_block_invoke + 34
    frame autodesk-forks#13: 0x00007fff204c6be9 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
    frame qt#14: 0x00007fff204c66dd CoreFoundation`__CFRunLoopDoTimer + 927
    frame qt#15: 0x00007fff204c623a CoreFoundation`__CFRunLoopDoTimers + 307
    frame qt#16: 0x00007fff204ace13 CoreFoundation`__CFRunLoopRun + 1988
    frame qt#17: 0x00007fff204abf8c CoreFoundation`CFRunLoopRunSpecific + 563
    frame qt#18: 0x00007fff2123d607 Foundation`-[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212
    frame qt#19: 0x00007fff22f378f0 AppKit`-[NSAnimation(NSInternal) _runBlocking] + 453
    frame qt#20: 0x00007fff22f376ae AppKit`__42-[NSAnimation(NSInternal) _runInNewThread]_block_invoke + 97
    frame qt#21: 0x0000000104edb032 libdispatch.dylib`_dispatch_call_block_and_release + 12
    frame qt#22: 0x0000000104edc264 libdispatch.dylib`_dispatch_client_callout + 8
    frame qt#23: 0x0000000104ef04ac libdispatch.dylib`_dispatch_root_queue_drain + 828
    frame qt#24: 0x0000000104ef0d3f libdispatch.dylib`_dispatch_worker_thread2 + 127
    frame qt#25: 0x0000000104f7eac7 libsystem_pthread.dylib`_pthread_wqthread + 244
    frame qt#26: 0x0000000104f7dae3 libsystem_pthread.dylib`start_wqthread + 15

This has been e.g. observed when a QNSWindow isn't closed and released
at application quit as expected. Although that is a corner case that
shouldn't happen, the general case is still valid.

Fixes: QTBUG-96208
Change-Id: I6c9d220e6f5389707baf7ae983f3156e8e51c316
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
(cherry picked from commit b6200de)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

Says ASAN:

    Direct leak of 524 byte(s) in 1 object(s) allocated from:
    #0 0x7f708f0a67cf in __interceptor_malloc ../../../../gcc/libsanitizer/asan/asan_malloc_linux.cpp:145
    autodesk-forks#1 0x7f707d94bf9e in CRYPTO_malloc crypto/mem.c:196
    autodesk-forks#2 0x7f707d7bd248 in asn1_item_flags_i2d crypto/asn1/tasn_enc.c:65
    autodesk-forks#3 0x7f707d7bd1b7 in ASN1_item_i2d crypto/asn1/tasn_enc.c:45
    autodesk-forks#4 0x7f707d85b7be in i2d_DHparams crypto/dh/dh_asn1.c:54
    autodesk-forks#5 0x7f7075a82223 in q_i2d_DHparams(dh_st*, unsigned char**) qsslsocket_openssl_symbols.cpp:435
    autodesk-forks#6 0x7f7075a82223 in QTlsBackendOpenSSL::dhParametersFromPem(QByteArray const&, QByteArray*) const qssldiffiehellmanparameters_openssl.cpp:139
    autodesk-forks#7 0x7f708ca9b588 in QSslDiffieHellmanParametersPrivate::initFromPem(QByteArray const&) qssldiffiehellmanparameters.cpp:285
    autodesk-forks#8 0x7f708ca9b588 in QSslDiffieHellmanParameters::fromEncoded(QByteArray const&, QSsl::EncodingFormat) qssldiffiehellmanparameters.cpp:94
    autodesk-forks#9 0x55fd8a545ebe in tst_QSslDiffieHellmanParameters::constructionPEM() tst_qssldiffiehellmanparameters.cpp:98
    [...]

The pointer returned in the out-parameter of a i2d_DHparams() call is
supposed to be OPENSSL_free()ed by the user (this is not at all
obvious from the docs¹, but an SO answer² indicates that's how it
should be (as well as asan stopping from complaining with this
patch applied)).

¹ https://www.openssl.org/docs/man3.1/man3/i2d_DHparams.html
² https://stackoverflow.com/a/53563669.

Amends 2cf63c7.

[ChangeLog][QtNetwork][SSL] Fixed a memory leak in parsing of
PEM-encoded Diffie-Hellman parameters.

Change-Id: I9ed4a26c4676db1c0d54a1945a4fb5014ce568cd
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
(cherry picked from commit 676087e)