wrapper .h files and asm labels to let internal calls resolve directly and
not be overridable or use the PLT.  Then, apply that framework to most of
the functions in stdio.h, string.h, err.h, and wchar.h.  Delete the
should-have-been-hidden-all-along _v?(err|warn)[cx]? symbols while here.
tests clean on i386, amd64, sparc64, powerpc, and mips64
naming feedback from kettenis@ and millert@
ok kettenis@

Kill old files that are no longer compiled.
okay theo

rescinded 22 July 1999.  Proofed by myself and Theo.

Make sure everything uses {SYS,}LIBC_SCCS properly