Fixing loading behaviour according to the documentation

* Check responseHeaders presence before use them

And so avoid some messages in log file.

Now we are finally using the 2.x branch of the SAML2 library, which was also migrated to use namespaces. Even though the library provides an autoloader that allows loading the classes with the old names using class aliasing, we need to do the migration in one commit (at least for most part of it). This is due to the way SimpleSAMLphp checks data types, using inheritance to check objects agains abstract or more general classes. Even though class aliasing works, there's no way to replicate those relationships, and type checks that use the old class names will fail because the aliases are virtually new classes that don't inherit from others.

(being respectful with occurences that might change the behaviour, i.e. default database prefixes)

Allow to specify which metadata sets to use in metarefresh. Can be configured either per set or per source.

Schedule SimpleSAML_Utilities::writeFile() for removal.

Revert "Fail gracefully while parsing EntitiesDescriptor in the metarefresh module. Now only the offending entity is disregarded. Fixes #70."

This reverts commit 6a614913.

Revert "Fix a bug introduced in 6a614913 that made it impossible for nested EntitiesDescriptor elements to be parsed due to name spaces lost in the process."

This reverts commit ffce79e8.

Fix a bug introduced in 6a614913 that made it impossible for nested EntitiesDescriptor elements to be parsed due to name spaces lost in the process.

Fail gracefully while parsing EntitiesDescriptor in the metarefresh module. Now only the offending entity is disregarded. Fixes #70.

Moved a try / catch up one level in MetaLoader.php so that it is possible to re-use cached metadata if the XML cannot be parsed

Allow metarefresh module to specify the permissions of the resulting files, overriding the default 0600. Contributed by Dick Visser.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3260 44740490-163a-0410-bde0-09ae8108e29a

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3087 44740490-163a-0410-bde0-09ae8108e29a

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3086 44740490-163a-0410-bde0-09ae8108e29a

Thanks to Dick Visser for implementing this!

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3020 44740490-163a-0410-bde0-09ae8108e29a

This patch adds support for only updating metadata files that have
changed on the server. This reduces bandwidth used, and also allows
us to skip metadata parsing, which speeds things up significantly.

Thanks to Dyonisius Visser for implementing this!

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2980 44740490-163a-0410-bde0-09ae8108e29a

Thanks to Dyonisius Visser for implementing this.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2782 44740490-163a-0410-bde0-09ae8108e29a

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2620 44740490-163a-0410-bde0-09ae8108e29a

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2258 44740490-163a-0410-bde0-09ae8108e29a

Patch created by Thijs Kinkhorst <thijs@kinkhorst.com>.

Fixes issue 296.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@2225 44740490-163a-0410-bde0-09ae8108e29a

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1968 44740490-163a-0410-bde0-09ae8108e29a

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1964 44740490-163a-0410-bde0-09ae8108e29a

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1644 44740490-163a-0410-bde0-09ae8108e29a