libevent: Avoid redundant invocations of init_extension_functions for IOCP
Merge branch 'master' of github.com:jedisct1/dnscrypt-proxy

* 'master' of github.com:jedisct1/dnscrypt-proxy:
  Gentoo ebuild: Backport patch to fix always compiling plugins
  Bump libsodium Gentoo ebuild to version 0.4.5
  Update Gentoo ebuilds to use autotools-utils
  Add masters attribute to Gentoo overlay layout.conf