refactor: Move packages into packages/

packages/moxxmpp/lib/src/rfcs/rfc_4790.dart

@@ -0,0 +1,26 @@
+/// A sort comparator using the i;octet collation defined by RFC 4790
+// TODO(Unknown): Maybe enforce utf8?
+int ioctetSortComparator(String a, String b) {
+  if (a.isEmpty && b.isEmpty) {
+    return 0;
+  }
+
+  if (a.isEmpty && b.isNotEmpty) {
+    return -1;
+  }
+
+  if (a.isNotEmpty && b.isEmpty) {
+    return 1;
+  }
+
+  if (a[0] == b[0]) {
+    return ioctetSortComparator(a.substring(1), b.substring(1));
+  }
+
+  // TODO(Unknown): Is this correct?
+  if (a.codeUnitAt(0) < b.codeUnitAt(0)) {
+    return -1;
+  }
+  
+  return 1;
+}