ldap: Add client certificate support (#6668)
* Set up secure ldap server
* ldap: Added client cert options
Shamelessly copied from https://github.com/andrewshulgin/ldap_search
* Added tests for ldap client authentication
* Add changelog fragment
* Make sure the openssl commands work on older versions of openssl
* Apply suggestions from code review
Co-authored-by: Felix Fontein <felix@fontein.de>
* Remove aliases for new arguments
* Add required_together to ldap module declerations
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Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit f3ecf4c7f8)
Co-authored-by: Gnonthgol <gnonthgol+github@gmail.com>
