Harmonize ldap_rename_ext with ldap_rename parameter names

Co-authored-by: Nikita Popov <nikita.ppv@googlemail.com>

Rename $link parameters to $ldap in ldap functions

Also fixed ldap_set_option places where $newvalue was still used

Improve parameter naming in ldap_rename

Co-authored-by: Nikita Popov <nikita.ppv@googlemail.com>

Improve parameter naming in ldap_exop_passwd

Co-authored-by: Nikita Popov <nikita.ppv@googlemail.com>

Improve parameter naming in ldap_connect

Co-authored-by: Nikita Popov <nikita.ppv@googlemail.com>

Improve parameter naming in ldap_set_option ext/ldap/ldap.stub.php

Co-authored-by: Nikita Popov <nikita.ppv@googlemail.com>

Explicitely mark nullable strings

Fix parameter names in ext/ldap

Renamed all parameters to be consistent and concise

Fix "null" case in ldap.stub.php

Remove dummy_ber parameter from ldap_first_attribute and ldap_next_attribute

It has been unused and deprecated since PHP 5.2.4

Set all parameters to ldap_sasl_bind as NULL by default

For mech, realm, authcid, authzid and props NULL means do not change
current server setting.

Default bind dn and password to NULL in ldap_bind_ext

Default bind dn and password to NULL in ldap_bind

Make URI parameter in ldap_connect default to NULL

Display string default values in stubs more uniformly

Settling on using quoted string

Use ZPP instead of custom type checks

We can add these types as a native type declaration to stubs as a side-effect. Closes GH-6068

Add another round of missing parameter types to stubs

Closes GH-5950

Add a bunch of missing argument types to stubs

Convert the $ttl parameter of ldap_exop_refresh() to int

Add ldap_count_references()

Closes GH-5784

Promote warning to exception in ldap_set_rebind_proc()

From now on, ldap_set_rebind_proc() will only accept callable or null
as argument 2.

Closes GH-5763

Fix [-Wundef] warnings in LDAP extension

Drop check for HAVE_NSLDAP

This constant is never defined thus useless

Fix nullable types in PHPDoc

Improve gen_stub.php

Closes GH-5350
Add support for generating deprecated function entries, as well as forward declaration
of function aliases.