bump libevent to 2.1.8 (stable) (#1397)

depends/packages/libevent.mk

@@ -1,12 +1,11 @@
 package=libevent
-$(package)_version=2.0.22
-$(package)_download_path=https://github.com/libevent/libevent/releases/download/release-2.0.22-stable
-$(package)_file_name=$(package)-$($(package)_version)-stable.tar.gz
-$(package)_sha256_hash=71c2c49f0adadacfdbe6332a372c38cf9c8b7895bb73dabeaa53cdcc1d4e1fa3
-$(package)_patches=reuseaddr.patch
+$(package)_version=2.1.8
+$(package)_download_path=https://github.com/libevent/libevent/archive/
+$(package)_file_name=release-$($(package)_version)-stable.tar.gz
+$(package)_sha256_hash=316ddb401745ac5d222d7c529ef1eada12f58f6376a66c1118eee803cb70f83d
 
 define $(package)_preprocess_cmds
-  patch -p1 < $($(package)_patch_dir)/reuseaddr.patch
+  ./autogen.sh
 endef
 
 define $(package)_set_vars

depends/patches/libevent/reuseaddr.patch

@@ -1,21 +0,0 @@
---- old/evutil.c   2015-08-28 19:26:23.488765923 -0400
-+++ new/evutil.c   2015-08-28 19:27:41.392767019 -0400
-@@ -321,15 +321,16 @@
- int
- evutil_make_listen_socket_reuseable(evutil_socket_t sock)
- {
--#ifndef WIN32
- 	int one = 1;
-+#ifndef WIN32
- 	/* REUSEADDR on Unix means, "don't hang on to this address after the
- 	 * listener is closed."  On Windows, though, it means "don't keep other
- 	 * processes from binding to this address while we're using it. */
- 	return setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &one,
- 	    (ev_socklen_t)sizeof(one));
- #else
--	return 0;
-+	return setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const char*) &one,
-+		(ev_socklen_t)sizeof(one));
- #endif
- }
-