Fix #66021 (Blank line inside empty array/object)

Changed json_encode() so that when the JSON_PRETTY_PRINT option is specified,
the pair of linefeeds immediately after an opening bracket and before the
corresponding closing bracket is omitted when the array or object contains no
elements or accessible properties (and hence would have a blank line between
the brackets).
Fix windows build
Fix bug #66482, replace wrong item name 'priority' with 'process.priority' in php-fpm.conf
Fix #66562: Consistency bug where curl_multi_getcontent behaves different from curl_exec

curl_exec returns an empty string when data is received from a domain that returns zero content. curl_multi_getcontent
returned null. Now it returns an empty string fixing the incosistency
Fixed bug #64604
Merge branch 'pull-request/518' into PHP-5.4

* pull-request/518:
  Fix #66021 (Blank line inside empty array/object)
fix NEWS
Fixed bug #67033 Remove reference to Windows 95
backported some ext/intl tests from 5.6 into 5.4
Fix bug #66171: better handling of symlinks
Fix null byte in LDAP bindings
ws fix
Fix #66942: openssl_seal() memory leak

Fix #66952: memory leak in openssl_open()
fix windows build
Fix test - on CI somebody could create a process in the meantime
5.4.29 is next
Fixed bug #67081 DOMDocumentType->internalSubset returns entire DOCTYPE tag, not only the subset
correct the bug #67081 fix
Fixed bug #67072 Echoing unserialized "SplFileObject" crash

The actual issue lays in the unserializer code which doesn't honor
the unserialize callback. By contrast, the serialize callback is
respected. This leads to the situation that even if a class has
disabled the serialization explicitly, user could still construct
a vulnerable string which would result bad things when trying
to unserialize.

This conserns also the classes implementing Serializable as well
as some core classes disabling serialize/unserialize callbacks
explicitly (PDO, SimpleXML, SplFileInfo and co). As of now, the
flow is first to call the unserialize callback (if available),
then call __wakeup. If the unserialize callback returns with no
success, no object is instantiated. This makes the scheme used
by internal classes effective, to disable unserialize just assign
zend_class_unserialize_deny as callback.
These links to ~helly don't work anymore.