lxc_container struct: add comment about moving member fns

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>

diff --git a/src/lxc/lxccontainer.h b/src/lxc/lxccontainer.h
index 4c5d01d3e8001c052a08b6ebac2ae51837f57b59..a342a398c477aa9879c1b07bcfdf5e9867ade2d1 100644 (file)
--- a/src/lxc/lxccontainer.h
+++ b/src/lxc/lxccontainer.h
@@ -51,6 +51,10 @@ struct lxc_lock;
 
 /*!
  * An LXC container.
+ *
+ * Note that changing the order of struct members is an API change, as callers
+ * will end up having the wrong offset when calling a function.  So when making
+ * changes, whenever possible stick to simply appending new members.
  */
 struct lxc_container {
        // private fields