* Add Random\Random{Error,Exception} and Random\BrokenRandomEngineError
* Throw BrokenRandomEngineError
* Throw RandomException on seeding failure
* Throw RandomException when CSPRNG fails
* Remove unused include from ext/random/engine_combinedlcg.c
* Remove unused include from ext/random/engine_secure.c
* Remove unused include from ext/random/random.c
* [ci skip] Add ext/random Exception hierarchy to NEWS
* [ci skip] Add the change of Exception for random_(int|bytes) to UPGRADING
* Fix PcgOneseq128XslRr64::__construct() definition in random.stub.php
The second parameter does not actually exist for a Oneseq PCG. It was removed
from the RFC before it went into voting.
* [ci skip] Add PcgOneseq128XslRr64 stub fix to NEWS
Since argument overloading is not safe for reflection, the method needed
to be split appropriately.
Co-authored-by: Tim Düsterhus <timwolla@googlemail.com>
Closes GH-9057.
