* SQL: changed init session table so it will work on MSSQL Databases

* SQL: changed rowCount by count of fetchAll
rowCount does not always returns number of rows on SELECT queries, i.e. MSSQL returns -1

PSR-12 compliancy

* Rationalize SQL Store insertOrUpdate

* Handle duplicate insertion also for SQL Server
* Improve 'update or insert' handling for different SQL drivers

For Redis instances that require authentication, the current Redis store does not work.  So, this commit adds optional support for utilizing the Predis password option.  It will pick up the password from the config file and pass it along when it instantiates the Predis client.

The test simply checks that adding the password option doesn't break the constructor. Since Predis parameters end up as protected, we can't verify that the instance contains the password.

Makes no sense to use a protected constructor here.. In fact, it restricts is from unit-testing this class

Declaration of kvstore _expires field was defaulting to current
timestamp in MySQL.
Added mini upgrade script to kvstore init method to add default null
value.

I may be missing something but I haven't found a way to add the --ssl-ca
MySQL option to my database connection. It appears we just need to pass
in an $options param.

Add a check to the constructor of the new redis store to check if predis/predis is available, and throw a critical configuration error if not.

Formatting, namespaces, phpdoc.

Use LONGTEXT instead of the TEXT data type in MySQL to avoid size constraints in the latter. This resolves #399.

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

Prevent data-collision when hosting several SSP-instances on one machine, when more than one is using memcache.

Introduces new config setting 'memcache_store.prefix'.

Fix for issue #524. The get() method of the SimpleSAML_Store interface should always return NULL in case of failure.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3227 44740490-163a-0410-bde0-09ae8108e29a

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3125 44740490-163a-0410-bde0-09ae8108e29a