Copy filter: wake up subrequests after aio operations. Previously, connection write handler was called, resulting in wake up of the active subrequest. This change makes it possible to read data in non-active subrequests as well. For example, this allows SSI to process instructions in non-active subrequests earlier and start additional subrequests if needed, reducing overall response time.

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


    cat << END                                            >> $NGX_MAKEFILE

$NGX_LIBATOMIC/src/libatomic_ops.a:	$NGX_LIBATOMIC/Makefile
	cd $NGX_LIBATOMIC && \$(MAKE)

$NGX_LIBATOMIC/Makefile:	$NGX_MAKEFILE
	cd $NGX_LIBATOMIC \\
	&& if [ -f Makefile ]; then \$(MAKE) distclean; fi \\
	&& ./configure

END