Merge branch 'master' into os2

TODO

@@ -1 +1,16 @@
 - Check VERY thoroughly for memory leaks in our usage of the FFI over OpenSSL.
+
+- Figure out the following, observed while flooding the server with
+  cat /dev/zero piped into ssh localhost -p 2322:
+
+    Seg fault (internal error) at 0x4
+    Bus error
+
+  After a while it crashes out like that. Or seems to deadlock.
+
+- Figure out what the rules for packet size limit really are. Is it
+  payload limit or what? Why does OpenSSH give us these large packets
+  sometimes?
+
+- Buffer outbound traffic during rekey so we don't try to talk between
+  KEXINIT and NEWKEYS