Summary:
Kolab used to depend on version 4 of the otphp library, which returns
its computed OTP codes as integers. Hence, the kolab_2fa plugin converts
the user input to `int` in order to facilitate comparisons using the
`===` operator.
Starting with version 5, which is now bundled with Kolab, otphp returns
a string instead of an integer. Now the comparison is between an `int`
and a `string`, and thus consistently yields `false`. As a result, no
TOTP code is ever accepted.
Fix TOTP authentication by removing the now-obsolete conversion to
`int`.
Reviewers: machniak
Reviewed By: machniak
Differential Revision: https://git.kolab.org/D4370
Allow kolab_auth plugin to populate 'kolab_2fa_factors' config option through 'kolab_auth_role_settings'
and hereby define the active authentication factors from the one LDAP query.
