What ports require this port?

[b. f.]

> Over the weekend, a new feature was added to FreshPorts BETA.  A port
> now lists all ports that require it.  This code will eventually move to
> production after it's been running on on the beta site for a while.
>
> Notes:
>
> * The code uses the output of make -V RUN_DEPENDS -V LIB_DEPENDS -V
> BUILD_DEPENDS

If you're going to include BUILD_DEPENDS, then you should also use -V
PATCH_DEPENDS -V FETCH_DEPENDS.

b.