VMM: Unified parameter names and option names.
handler: Handler.user_delete() renamed parameter:
delete_home -> del_dir
The same as in Handler.domain_delete().
cli/subcommands: renamed userdelete's option
--delete-home -> --delete-directory
So people have to memorize only one option name. It also matches the
setting names of vmm.cfg.
==========================
Configuration file for vmm
==========================
When you have installed vmm as described in :doc:`installation/install_vmm`
a copy of :download:`vmm.cfg <_static/vmm.cfg>` will be stored in
:file:`{$PREFIX}/share/doc/vmm`.
.. literalinclude:: _static/vmm.cfg
:language: cfg