Description:
------------
See code.

It appears that this is caused by macromancy: value of `val` is inadvertently changed by another use of `GET_VER_OPT`.

https://github.com/php/php-src/blob/master/ext/openssl/xp_ssl.c#L504-L535


Test script:
---------------
file_get_contents('https://self-signed.badssl.com/', false, stream_context_create([
	'http' => [
		'method' => 'GET',
	],
	'ssl' => [
		'allow_self_signed' => true,
		'peer_fingerprint' => '641450D94A65FAEB3B631028D8E86C95431DB811',
	],
]));


Expected result:
----------------
Request should complete.


Actual result:
--------------
Error with message "Expected peer fingerprint must be a string or an array" is seen.