add section on how to use cadave with seeddms

doc/README.WebDAV

@@ -53,7 +53,7 @@ and possibly add your login data to /etc/davfs2/secrets
 Making applications work with WebDAV
 =====================================
 
-Various programms have differnt strategies to save files to disk and
+Various programms have differnt strategies to save files to disc and
 prevent data lost under all circumstances. Those strategies often don't
 work very well an a WebDAV-Server. The following will list some of those
 strategies.
@@ -91,3 +91,39 @@ set noswapfile
 Creating the backup file in a directory outside of WebDAV doesn't help in
 this case, because it still does the file renaming which is turned of by
 'nowritebackup'.
+
+cdaver
+========
+
+cadaver is a webdav client similar to classical command line based ftp clients.
+It can be used to browse through the folders, downloads and uploads files, and
+also for removing and moving folders and documents (called resources in webdav terminilogy).
+It's also capable of setting and getting properties of folders and documents.
+If webdav access isn't working, this client is probably the best for testing.
+
+Just run
+
+cadaver https://<your-domain>/<your-basedir>/webdav/index.php
+
+It will ask for the user name and password. Once you are logged in just
+type `help` for a list of commands.
+
+SeedDMS stores a lot more properties not covered by the webdav standard.
+Those have its own namespace called 'SeedDMS:'. Just type
+
+propget <resource>
+
+with `resource` being either the name of a folder or document. You will
+get a list of all properties stored for this resource. Setting a property
+requires to set the namespace first
+
+set namespace SeedDMS:
+
+Afterwards, you may set a property, e.g. the comment, with
+
+propset <resource> comment 'Just a comment'
+
+or even delete a property
+
+propdel <resource> comment
+