message: Fixed Windows RPC bug by upgrading libevent
diff: 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
  +$(package)_version=2.1.8-stable
  +$(package)_download_path=https://github.com/libevent/libevent/archive/
  +$(package)_file_name=release-$($(package)_version).tar.gz
  +$(package)_sha256_hash=316ddb401745ac5d222d7c529ef1eada12f58f6376a66c1118eee803cb70f83d
  define $(package)_preprocess_cmds
  - patch -p1 < $($(package)_patch_dir)/reuseaddr.patch
  + ./autogen.sh
  endef
  define $(package)_set_vars
  - $(package)_config_opts=--disable-shared --disable-openssl --disable-libevent-regress
  + $(package)_config_opts=--disable-shared --disable-openssl --disable-libevent-regress --disable-samples
  $(package)_config_opts_release=--disable-debug-mode
  $(package)_config_opts_linux=--with-pic
  endef
  