Squashed 'third_party/libevent/' content from commit d8ceae8

Change-Id: I84e1b23561eb225b9f288717b028e6bc9e5a27e1
git-subtree-dir: third_party/libevent
git-subtree-split: d8ceae81b83f3d0a56e2f41d4c429b2702a8e302
diff --git a/make-event-config.sed b/make-event-config.sed
new file mode 100644
index 0000000..b343e3b
--- /dev/null
+++ b/make-event-config.sed
@@ -0,0 +1,23 @@
+# Sed script to postprocess config.h into event-config.h.
+
+1i\
+/* event2/event-config.h\
+ *\
+ * This file was generated by autoconf when libevent was built, and post-\
+ * processed by Libevent so that its macros would have a uniform prefix.\
+ *\
+ * DO NOT EDIT THIS FILE.\
+ *\
+ * Do not rely on macros in this file existing in later versions.\
+ */\
+\
+#ifndef _EVENT2_EVENT_CONFIG_H_\
+#define _EVENT2_EVENT_CONFIG_H_\
+
+$a\
+\
+#endif /* event2/event-config.h */
+
+s/#define /#define _EVENT_/
+s/#undef /#undef _EVENT_/
+s/#ifndef /#ifndef _EVENT_/