package version and variant info in `main.log`

[Ryan Schmidt]

On Nov 7, 2019, at 03:16, Werner LEMBERG wrote:

> I've noticed that in `main.log` files there is no information what
> version and variants have been requested – for example,
> 
>  ImageMagick @6.9.9-40_7+x11
> 
> Wouldn't it make sense to make `port` add this information to the very
> top of `main.log`? This would also help identify various `make.log` files
> more easily.

If that's not already in there, then yes, that would be good to have.