Replace deprecated Sqlite-calls with PDO-calls 

 Return XML parser error in metarefresh

To aid administrators in finding the root cause of an XML parse fail,
we should return the error message we got from the underlying parser.

* Add authproc filter to test correct cardinality

Attribute schemas often have specific requirements for the number of
values a particular attribute may have, and violating the cardinality
rules associated with these may have unexpected and undesirable results.

The two authproc filters this change introduces allow the cardinality of
attributes to be tested. core:Cardinality is the more general case, and
allows for both a minimum and maximum number of values to be tested.
Processing will abort with an error if too few or too many are received.

core:CardinalitySingle is a special case of this for single-valued
attributes, and allows various corrective actions to be taken rather
than aborting. This allows for cardinality mistakes to be "fixed" in a
predictable way, and can also be used to construct single-valued
attributes from multi-valued ones.

* Fix typo

* Fix tests

* Added Dutch translations

* Fix phpdoc

* Whitespace fixes

This commit consists of patches automatically generated for this project on https://scrutinizer-ci.com

* Fix typo in fixing typo

This commit consists of patches automatically generated for this project on https://scrutinizer-ci.com

ADFS improvements

use the configured attribute as the group name rather than
the DN

The equation was wrong.. exceeding means > not >=

Add ldap-search scope

* Support metadata XML directly in config
Also consider 'xml' as a key, in addition to 'url' and 'file'.
When provided, attempt to load this directly as a metadata XML string.
This is useful when working with dynamic configuration and external polling of metadata updates.

* Test loading XML from a fixed string
No preexisting test in this area
Adjust XML loader to only get global config in file mode - otherwise it is
unused, and it might pollute the test usage.
Test that an actully invalid config throws an exception, but that minimal valid
(albeit useless) XML is accepted.

Update copyright year from 2017 to 2018

Document IDPList option on saml20-idp-remote.php

Fix missing translation for metarefresh

Avoid db credentials in stack trace

PSR-2 lint fixes in lib/ directory