extend authX509 module with authentication processing filter for generating certificate expiry warnings

It has been marked deprecated and generates warnings since 2013.
The functionality is easily replaced by using the smartattributes module.

Since PHP 5.3 is required, there's no need to treat users of 5.1.2-5.2 specially. Also we can safely use LDAP_OPT_NETWORK_TIMEOUT now.

No need to keep it around as deprecated, since it has only been in master, never in a released version, and has been added just a few months ago.

Add tests for most of the data retrieval functions. No tests
for the metadata functions present though.

It has never really gained traction and is now superseeded by the composer module installer.

* One test suite for all tests.
* One file per class that is tested.

These changes should make it easier to add new tests.

This class has been broken for several years, and we are not aware of
any users of it. Delete that class and any code instantiating that class.

Update IPv6 CIDR checks.

This add testing on PHP 7.0 (nightly build). The test is added as an
allowed failure for now. but it can be useful to keep an eye on it just
in case we do something that won't work in PHP 7.

inet_pton failure is captured later - silence so unit tests pass.

Currently, if we try to load a class from a module, and the config.php
is absent, we will get an error about the missing configuration file.

There is no reason for the configuration file to be mandatory here,
since we have reasonable fallbacks, so fix the code to make it
optional.

This should make it easier to write tests for code in modules.

LDAP Connection Improvements

Disable login button with JS after first click.

Removed an 'if' sentence that prevents a Store class from being added.

Remove misleading and unused config option

# By Brian Vuyk
# Via Brian Vuyk (1) and Jaime Pérez Crespo (1)
* 'master' of github.com:simplesamlphp/simplesamlphp:
  Use !in_array() for improved readability
  Add support for sender-vouches

Add support for sender-vouches

Removed a 'if' sentence than prevents a Store class couldn't be added if it is named with a namespace instead with the sspmod_<module>_Store_<class> way.

Minor documentation corrections