Deprecate implicit nullable parameter types (#12959)

RFC: https://wiki.php.net/rfc/deprecate-implicitly-nullable-types

Co-authored-by: Gina Peter Banyard <girgias@php.net>

Add FPM tester logs printing for all errors

Closes GH-12902

Warn when fpm socket was not registered on the expected path

This might happen if the UDS length limit is exceeded.

Co-authored-by: Jakub Zelenka <bukka@php.net>

Closes GH-

Warn when fpm socket was not registered on the expected path

This might happen if the UDS length limit is exceeded.

Co-authored-by: Jakub Zelenka <bukka@php.net>

Closes GH-11066

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Fix bug #68207: Setting fastcgi.error_header can result in a WARNING

Fix GH-9754: SaltStack hangs when running php-fpm 8.1.11

SaltStack uses Python subprocess and redirects stderr to stdout which is
then piped to the returned output. If php-fpm starts in

Fix GH-9754: SaltStack hangs when running php-fpm 8.1.11

SaltStack uses Python subprocess and redirects stderr to stdout which is
then piped to the returned output. If php-fpm starts in daemonized mode,
it should close stderr. However a fix introduced in GH-8913 keeps stderr
around so it can be later restored. That causes the issue reported in
GH-9754. The solution is to keep stderr around only when php-fpm runs in
foreground as the issue is most likely visible only there. Basically
there is no need to restore stderr when php-fpm is daemonized.

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Rework FPM tests logging for better debugging