Author: Iñaki Arenaza
MDL-50625 auth_ldap: Better check for paged results support
There is at least one LDAP server (Sun Directory Server) that doesn't
support Paged Results extension, even if it supports LDAP version 3. So
checking just for LDAP version is not enough.
If possible, we check the supportedControl attribute of the LDAP rootDSE
and see if the paged results control is available. This needs an LDAP
connection, which might not be possible to establish before we configure
some essential LDAP settings (server, bind user, password, etc.). Thus
we try to establish the connection and check the supportedControl
attribute. But if we fail, we perform only basic checks that are less
accurate and err on the side of cautiousness.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=52c14af205171bff08bd38f9407d7f2ff4f9872a
http://github.com/moodle/moodle/commit/52c14af205171bff08bd38f9407d7f2ff4f9872a
+ 3.1 en [pagedresultsnotsupp,auth_ldap]