ldap-module functionality for password-changes

[mboehm21]

LDAP-Password change

Following the disussion in the thread from the mailing-list linked below it should be a useful addition to the LDAP-module if it would support password changes so this has not to be handled in a separate script and all LDAP-communication can be done by a single module.

An unlang-example of a challenge/response password-change situation where the functionality within the module could be helpful is also in the linked post. The "ldap.pwchange" should replace the usage of the perl-module in the example.

http://freeradius.1045715.n5.nabble.com/FreeRADIUS-OpenLDAP-password-change-and-RSA-SecurID-Next-Token-Mode-tp5752798p5752927.html

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[arr2036]

We need to add in arbitrary module methods for this to work.

[alandekok]

The nabble link no longer works. The normal FreeRADIUS mailing list still works. https://lists.freeradius.org/pipermail/freeradius-users/2018-November/093841.html