annoying -Wshadow warning

[Doug Evans]

Joseph S. Myers writes:
 > On Tue, 9 Jul 2002, Doug Evans wrote:
 > 
 > > It's worse than useless.
 > > It can vastly reduce the signal/noise ratio of gcc output.
 > > It bubbles up parameter names in header files into the global namespace.
 > > 
 > > Suppose I have an app that uses two separate libraries and one
 > > library happens to declare a function with a parameter whose name
 > > is that of a function in the other library [in my case bfd and rscheme].
 > 
 > Arguably each library should use parameter names within a namespace that
 > library reserves, to avoid problems with user macros as well.  (Just as
 > glibc uses __-prefixed parameter names, in the implementation namespace.)

True.  In the meantime, if everyone is agreed this particular
variant of the warning contributes no value, can we remove it?