Merge of r5017: fixed null dereference with resolver and poll. Events: fixed null pointer dereference with resolver and poll. A POLLERR signalled by poll() without POLLIN/POLLOUT, as seen on Linux, would generate both read and write events, but there's no write event handler for resolver events. A fix is to only call event handler of an active event.

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


all:
	cd $(OPENSSL)

	perl Configure VC-WIN32 no-shared --prefix=openssl $(OPENSSL_OPT)

	ms\do_ms

	$(MAKE) -f ms\nt.mak
	$(MAKE) -f ms\nt.mak install