chroot(2)ed or jail(8)ed www/apache{13,2,21} ports?

[Cordula's Web]

Hi,

is there a configuration option to install www/apache13 and
www/apache2 [www/apache21] in a chroot(2) environment,
or perhaps even in a jail(8)? There's no knob in the ports
Makefile(s) for this, and doing it manually is error-prone...

BTW, what's the difference between www/apache2 and www/apache21?

Thanks.

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Cordula's Web. http://www.cordula.ws/