Using null as memcache prefix in default config causes fatal error.

searchformultiple() will loop over all the configured base dn's to
search in. However, it would break on the first search that does
not return `false`. A search that yields 0 hits is not `false`, however
(it is only false when an error occurred). So when using more than one
base, users would not be found if they were part of the second or later
base, which is contrary to the intention.

This is now changed so the loop breaks when the result is not false, and
the number of found results is > 0.

Nothing works to make psalm work, try moving the config to the root of the repo and skip the -c parameter.

Also make the default namespace parameter mandatory, so that the function is not ADFS-specific.

Flexible namespace

Reduce state spill over between tests

Document cron module

Remove PHP 5.3 support from composer configuration

PSR-2 fix for ADFS module

This reverts commit b9f92f33.