Finished conversion to lqusers from webusers

Note that you will need to regenerate the webusers.toml file
after this.

Part of my motivation for this is that this file is not strictly
for governing web permissions in the future.

src/rust/lqos_node_manager/static/config.html

@@ -550,7 +550,7 @@
         }
 
         function userManager() {
-            let html = "<p>For now, please use <em>bin/webusers</em> to manage users.</p>";
+            let html = "<p>For now, please use <em>bin/lqusers</em> to manage users.</p>";
             $("#userManager").html(html);
         }