Merge branch 'be-openssl-fd-reset-fix-v2'

Two issues:
- dirty_shutdown for openssl 1.1
- BEV_CTRL_SET_FD for bufferevent_openssl didn't reset state

* be-openssl-fd-reset-fix-v2:
  Fix dirty_shutdown for openssl 1.1
  Fix reusing bufferevent_openssl after fd was reseted (i.e. on new connection)
  test/https: fix ssl dirty bypass for https_simple
  test/https: cover multiple request over the same connection
  test/http: sanity check for http_request_empty_done()

Reported-by: liutao74748@163.com
ML: http://archives.seul.org/libevent/users/Nov-2016/msg00041.html