[core] handle fds pending close after poll timeout (fixes #2827)
[core] handle fds pending close after poll timeout (fixes #2827)

handle fds pending close whether or not new events are triggered

(thx davidm)

x-ref:
  "POST to mod_cgi sometimes hangs"
  https://redmine.lighttpd.net/issues/2827

gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4