[SECURITY] apache2

There are currently over 30 outstanding CVEs against the distro's
outdated apache2 version.  Since nobody else seems to want it, here we
go:

ftp://ftp.cygwinports.org/pub/cygwinports/release-2/apache2/

That's 2.2.21; the latest 2.2.22 is in my upload queue, but has the same
layout, including a csih-based script for installing httpd2 as a
service.

Yaakov