Don't update to 2.0.0rc2, as it now requires POSIX timers that we lack (ie timer_create(), cf #4592) Switch to real releases instead of github Fixes a bunch of vulns, cf https://blog.talosintelligence.com/2017/07/vulnerbility-spotlight-freerdp-multiple.html tested by denis@ giovanni@ ajacoutot@ sthen@, thanks! ok ajacoutot@ sthen@