* Add initial SASL support with a limited set of mechanisms (DIGEST-M…

…D5, CRAM-MD5, PLAIN, ANONYMOUS).

* The Server RequestHandler interface now requires type-hints for all methods.
* Server request handlers can now return their own RootDSE if they choose to.
* Added an isValid() method to the Dn class.
* Added a firstValue() and lastValue() method for attributes.
* The client and server protocol handlers have been completely refactored.
* Implemented PHPStan and made fixes necessary to bump it to the max level.
* Introduced code coverage to CI runs.
* Moved CI runs into Github Actions.
* Use PSR-12 coding standards via ECS.

* Vastly improved memory efficiency and performance in general (espec…

…ially on large search results).

* Add a DirSync helper class for Active Directory.
* Add Active Directory specific controls: ExpectedEntryCount, SetOwner, ADPolicyHints, ShowDeleted, ShowRecycled
* Add a range retrieval helper class to make it easier to work with ranged results from Active Directory.
* Add a "rename()" convenience method to the LdapClient.
* Add a "move()" convenience method to the LdapClient.
* Add a "getDescription()" method to the Attribute class to retrieve the attribute with all options.
* Add a "getOptions()" method the the Attribute class to iterate through options for an attribute.
* Add a "fromArray" method to make constructing entry objects from arrays sound more natural.
* Calling the LdapClient "read()" method with no arguments will now return the RootDSE by default.
* Fix an OpenLDAP specific bug in the paging helper class. OpenLDAP does not return a control when aborting paging.
* Fix an issue with the Socket class not recognizing the certificate authority cert specified in the options.
* Implement OpenLDAP / Active Directory test servers with test data during CI runs for integration tests via PHPUnit.
* Moved the Socket classes to their own library so it can be used in other projects.
* Add more complete documentation for working with Entry objects.

Release version 0.4.0.

* Implement referral handling options.

* Add an LDAP URL parser / object based on RFC 4516.
* Honor the timeout_read setting in the LDAP client.
* Better handle remote disconnects / failed reads in the client to prevent hanging under some circumstances.
* Add magic methods to Entry objects for attribute access.
* Add an idle_timeout setting to the LDAP server. Default to 600 seconds.

* Renamed to FreeDSx to avoid naming confusion with the phpds extension.

* Implement very limited LDAP server functionality.
* Added a string filter parser based on RFC 4515. Allows creating filter objects from arbitrary string filters.
* Added a toString() method on filters for displaying their string filter representation.
* Add a compare() operation method helper to the LdapClient.
* Corrected the ASN1 encoding of the 'not' filter.
* Corrected BER encoding indefinite length partial PDU detection.
* Be more defensive on RDN creation when parsing the string.
* LDAP clients now throw an OperationException instead of a ProtocolException.
* Added documentation for the client and server.

Initial release.