PSR-12 compliancy

Fixes for the remainder of lib/SimpleSAML

Scrutinizer:
The expression $result of type array is implicitly converted to a boolean; are you sure this is intended? If so, consider using empty($expr) instead to make it clear that you intend to check for an array without elements.

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

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@222 44740490-163a-0410-bde0-09ae8108e29a

Added the possibility for the logger to get the trackID it self... Temporary thing, we shuold rewrite and improve the logging class a bit.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@165 44740490-163a-0410-bde0-09ae8108e29a

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@149 44740490-163a-0410-bde0-09ae8108e29a

Progress on the SAML 2.0 XML Meta data handler... Added a separate sipleXML parser, that I will reuse other places in the code.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@148 44740490-163a-0410-bde0-09ae8108e29a