Subject: master; Implement various enhancements in ldap.el and EUDC

From: Jens Schmidt <[email-masked]>
Date: Sun, 18 Jun 2023 23:52:37 +0200

This is a tracking bug for various enhancements in ldap.el and EUDC,
please do not close until further notice.

Some of my intentions:

- Add an additional front-end to EUDC, more user-friendly and dwimmy
   than `eudc-query-form'.

- Add commands in EUDC to traverse the management hierarchy of
   some organization.

- Extensions in particular to ldap.el to support above:

   + extension of the WITHDN parameter, since that is often (?) used
     to establish manager <=> reports relations

   + modernization of the code in `ldap-search-internal' to
     read LDAP attributes with less temporary files being created

   + option to return attributes in some specified order

This is also related to bug#64089, which I thought to be the starting
point of these enhancements.