Move literally everything out of src/or

This commit won't build yet -- it just puts everything in a slightly
more logical place.

The reasoning here is that "src/core" will hold the stuff that every (or
nearly every) tor instance will need in order to do onion routing.
Other features (including some necessary ones) will live in
"src/feature".  The "src/app" directory will hold the stuff needed
to have Tor be an application you can actually run.

This commit DOES NOT refactor the former contents of src/or into a
logical set of acyclic libraries, or change any code at all.  That
will have to come in the future.

We will continue to move things around and split them in the future,
but I hope this lays a reasonable groundwork for doing so.

1 files changed, 27 insertions, 0 deletions

diff --git a/src/core/or/destroy_cell_queue_st.h b/src/core/or/destroy_cell_queue_st.h
new file mode 100644
index 0000000000..2839b0bd11
--- /dev/null
+++ b/src/core/or/destroy_cell_queue_st.h
@@ -0,0 +1,27 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef DESTROY_CELL_QUEUE_ST_H
+#define DESTROY_CELL_QUEUE_ST_H
+
+/** A single queued destroy cell. */
+struct destroy_cell_t {
+  TOR_SIMPLEQ_ENTRY(destroy_cell_t) next;
+  circid_t circid;
+  uint32_t inserted_timestamp; /**< Time (in timestamp units) when this cell
+                                * was inserted */
+  uint8_t reason;
+};
+
+/** A queue of destroy cells on a channel. */
+struct destroy_cell_queue_t {
+  /** Linked list of packed_cell_t */
+  TOR_SIMPLEQ_HEAD(dcell_simpleq, destroy_cell_t) head;
+  int n; /**< The number of cells in the queue. */
+};
+
+#endif
+