Patch for more removal of old string functions

[Neil Booth]

Kaveh R. Ghazi wrote:-

>  > #if GCC_VERSION >= 20?? && !defined(bzero) && !defined(memset)
>  > #pragma GCC poison bzero
>  > #endif
> 
> (I don't recall offhand in what version gcc we got the "#pragma GCC
> poison" feature.)

#pragma poison has been in for a while.  However the GCC namespace
stuff was done by Zack back this summer, so no official release has it
IIRC.

Neil.