Add framework for resolving (pun intended) libc namespace issues, using
wrapper .h files and asm labels to let internal calls resolve directly and
not be overridable or use the PLT. Then, apply that

Add framework for resolving (pun intended) libc namespace issues, using
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@

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(char)to{upper,lower}()

zap remaining rcsid.

Kill old files that are no longer compiled.

okay theo

strcasestr(3), a case-insensitive version of strstr(3). already in netbsd
and freebsd, apparently written by torek, the man we never see anymore;
submitted by jcs, but he is not around right now for

strcasestr(3), a case-insensitive version of strstr(3). already in netbsd
and freebsd, apparently written by torek, the man we never see anymore;
submitted by jcs, but he is not around right now for the libc major crank
so i sneak it in for him

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