[boost] local variable shadowing

This is a minor coding style feature request: I find local variable shadow warnings helpful, but when I include my favorite boost libraries (lexical casts, pool allocators, random numbers) I always have to do a bit of patching to remove the warnings within boost first. While this is pretty easy to do, I thought I'd check whether this could be fixed on mainline. So, 1) what's the process for submitting patches for this? Do I just go through each library maintainer? and 2) is there any way to get a visible warning (the equivalent of gcc's -Wshadow) into the boost build/test process? Thanks, -Chris