[patch] rm can have undesired side-effects

[perryh at pluto.rain.com]

> IMHO many problems arise when someone tries to please even the
> stupidest user by writing a fool-proof software. To me the beauty
> of Unixes is that they are _not_ fool-proof, e.g. your are holding
> a real gun, you should be carefull not to point it to your head
> and pull the trigger.

If we wanted to follow that line of reasoning to its logical
conclusion, I think we would have to make "-f" the default
behavior for rm, which BTW is how it worked in AT&T 6th Edition.