Merge of r4967: ngx_write_fd() and ngx_read_fd() errors handling. The ngx_write_fd() and ngx_read_fd() functions return -1 in case of error, so the incorrect comparison with NGX_FILE_ERROR (which is 0 on windows platforms) might result in inaccurate error message in the error log. Also the ngx_errno global variable is being set only if the returned value is -1.

# 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