autopkgtest failures after libffi soname change

php8.0 sees 5 test case failures in composer starting with 8.0.8-1build1, following the introduction of libffi 3.4.2-1 on Sept 10th.

There were 5 failures:

1) Composer\Test\Util\Http\ProxyManagerTest::testGetProxyForRequest with data set #1 (array('http://user:p%<email address hidden>', 'https://proxy.com:443', 'other.repo.org'), 'http://repo.org', 'http://user:p%<email address hidden>:80', array(array('tcp://proxy.com:80', 'Proxy-Authorization: Basic dX...pwQHNz', true)), false, 'http://user:***@proxy.com:80')
lastProxy check
Failed asserting that false is true.

/tmp/autopkgtest.kwg55b/build.q8t/src/tests/Composer/Test/Util/Http/ProxyManagerTest.php:92

2) Composer\Test\Util\Http\ProxyManagerTest::testGetStatus with data set #2 (array('http://user:p%<email address hidden>:80'), true, 'http=http://user:***@proxy.com:80')
message check
Failed asserting that false is true.

/tmp/autopkgtest.kwg55b/build.q8t/src/tests/Composer/Test/Util/Http/ProxyManagerTest.php:144

3) Composer\Test\Util\UrlTest::testSanitize with data set #0 ('https://foo:***@example.org/', 'https://foo:<email address hidden>/')
Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
-'https://foo:***@example.org/'
+'https://foo:<email address hidden>/'

/tmp/autopkgtest.kwg55b/build.q8t/src/tests/Composer/Test/Util/UrlTest.php:67

4) Composer\Test\Util\UrlTest::testSanitize with data set #3 ('http://***:***@example.org', 'http://10a8f08e8d7b7b9:<email address hidden>')
Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
-'http://***:***@example.org'
+'http://10a8f08e8d7b7b9:<email address hidden>'

/tmp/autopkgtest.kwg55b/build.q8t/src/tests/Composer/Test/Util/UrlTest.php:67

5) Composer\Test\Util\UrlTest::testSanitize with data set #4 ('https://foo:***@example.org:123/', 'https://foo:<email address hidden>:123/')
Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
-'https://foo:***@example.org:123/'
+'https://foo:<email address hidden>:123/'

/tmp/autopkgtest.kwg55b/build.q8t/src/tests/Composer/Test/Util/UrlTest.php:67