Lsl: Prim_left_click

I can't find this anywhere in the Wiki, but maybe I'm just dense. It looks like an oversight.

The left-click prim functionality is great, but there's no scriptinig interface to it. I have objects where it would be nice for them to change what happens when you left-click on them. So how about a call like:

llSetPrimitiveParams([PRIM_LEFT_CLICK, PRIM_LEFT_CLICK_SIT]);