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

this admins array is not used anywhere,
but it may be misleading to administrators who wants to restrict
the access to the metadata registry.

Use InvalidArgumentException instead of SimpleSAML_Error_Exception when dealing with wrong input parameters.

Move validateCA(), validateCABuiltIn() and validateCAExec() from SimpleSAML_Utilities to SimpleSAML_XML_Validator, where they are used. Remove validateCABuiltIn() and validateCAExec() from SimpleSAML_Utilities as they are no longer used. Eventually, all of this should disappear.

Deprecate SimpleSAML_Utilities::maskErrors() and SimpleSAML_Utilities::popErrorMask(). These two should be where they are used, in the OpenID modules.

Move SimpleSAML_Utilities::resolveCert() to SimpleSAML\Utils\Config::getCertPath() and deprecate the former.

Move SimpleSAML_Utilities::parseStateID() to SimpleSAML_Auth_State::parseStateID() and deprecate the former.

Deprecate SimpleSAML_Utilities::getDefaultEndpoint().

Move SimpleSAML_Utilities:: debugMessage() to SimpleSAML\Utils\HTTP::debugSAMLMessage() and deprecate the former.

Move SimpleSAML_Utilities:: checkCookie() to SimpleSAML\Utils\HTTP::checkSessionCookie() and deprecate the former.

SimpleSAML_Utilities::resolvePath was moved incorrectly to \SimpleSAML\Utils\HTTP instead of \SimpleSAML\Utils\System. Fix that.

Move SimpleSAML_Utilities:: redirectUntrustedURL() to SimpleSAML\Utils\HTTP:: redirectUntrustedURL() and deprecate the former.

Move SimpleSAML_Utilities:: checkURLAllowed() to SimpleSAML\Utils\HTTP:: checkURLAllowed() and deprecate the former.

Move SimpleSAML_Utilities:: redirectTrustedURL() to SimpleSAML\Utils\HTTP:: redirectTrustedURL() and deprecate the former.

Move SimpleSAML_Utilities:: setCookie() to SimpleSAML\Utils\HTTP:: setCookie() and deprecate the former.

Move the createPostRedirectLink(), postRedirect() and createHttpPostRedirectLink() methods in SimpleSAML_Utilities to \SimpleSAML\Utils\HTTP. The last one is made private, the others are renamed to submitPOSTData() and getPOSTRedirectURL(), respectively. Deprecate the three old ones.