Fix some memory bugs in ldap.c

Remove proto comments from C files

Closes GH-5758

Avoid some unnecessary uses of no_separation=0

For the rare cases where references are part of the API,
construct them explicitly. Otherwise do not allow separation.

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 macro redifinition warnings in debug builds

MSVC considers these warnings[1] to be severe (level 1), so we better
fix the respective code.

[1] <https://docs.microsoft.com/en

Fix macro redifinition warnings in debug builds

MSVC considers these warnings[1] to be severe (level 1), so we better
fix the respective code.

[1] <https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4005?view=vs-2019>

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Fix [-Wundef] warnings in LDAP extension

Improve gen_stub.php

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

Fix [-Wtype-limits] warning in LDAP by removing unnecessary condition

As context is a pointer to a berval struct and bv_len is of type
ber_len_t [1] which it self is defined as an unsign

Fix [-Wtype-limits] warning in LDAP by removing unnecessary condition

As context is a pointer to a berval struct and bv_len is of type
ber_len_t [1] which it self is defined as an unsigned integer [2]
this condition is always true.

[1] https://www.openldap.org/devel/gitweb.cgi?p=openldap.git;a=blob;f=include/lber.h#l212
[2] https://www.openldap.org/software//man.cgi?query=ber_free&sektion=3&apropos=0&manpath=OpenLDAP+2.4-Release

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Make error messages more consistent by fixing capitalization

Closes GH-5066 As a first step, let's capitalize their initial letter when it is applicable.

Fix usage of RETURN_THROWS() in LDAP extension

Use RETURN_THROWS() in various places

Use RETURN_THROWS() after zend_fetch_resource*()

Fix erroneous change

Use RETURN_THROWS() during ZPP in most of the extensions

Except for some bigger ones: reflection, sodium, spl

Cleanup return values when parameter parsing is unsuccessful

Adding ldap stubs for arginfo

Remove mention of PHP major version in Copyright headers

Closes GH-4732.

Merge branch 'PHP-7.4'

Remove nsldap support

The newest version we're checking (libssldap50) seems to be about
15 years out of date. We could add support for libssldap60 (also
unmainted, but more recent),

Remove nsldap support

The newest version we're checking (libssldap50) seems to be about
15 years out of date. We could add support for libssldap60 (also
unmainted, but more recent), but given how nobody has expressed any
interest in this, I'm going ahead and dropping this code.

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Merge branch 'PHP-7.4'

Fix potentially uninitialized use in ldap

If ctrl->ldctl_value.bv_len is zero context is uninitialized. Only
free it if the call took place and succeeded.

Merge branch 'PHP-7.4'

* PHP-7.4:
Don't modify arrays passed by value

Don't modify arrays passed by value

Remove some unnecessary RETURN_FALSE