Fix append mode so it always writes to the end and expand regress.
OK deraadt@ martijn@

Fix handling of "w+" mode, we were only truncating for "w".
OK martijn@ mpi@

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@

Add an open_wmemstream(3) implementation and fix various issues for
fmemopen(3) and open_memstream(3).

With inputs from millert@, stsp@, guenther@, tedu@ and matthew@

Add an implementation based on tedu@'s design of fmemopen(3) and
open_memstream(3) so they can be polished in-tree.

One of the manpages comes from NetBSD with some tweaks.

Prodded by espie@, krw@, guenther@

Fix handling of "w+" mode, we were only truncating for "w".
OK martijn@ mpi@

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@

Add an open_wmemstream(3) implementation and fix various issues for
fmemopen(3) and open_memstream(3).

With inputs from millert@, stsp@, guenther@, tedu@ and matthew@

Add an implementation based on tedu@'s design of fmemopen(3) and
open_memstream(3) so they can be polished in-tree.

One of the manpages comes from NetBSD with some tweaks.

Prodded by espie@, krw@, guenther@

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@

Add an open_wmemstream(3) implementation and fix various issues for
fmemopen(3) and open_memstream(3).

With inputs from millert@, stsp@, guenther@, tedu@ and matthew@

Add an implementation based on tedu@'s design of fmemopen(3) and
open_memstream(3) so they can be polished in-tree.

One of the manpages comes from NetBSD with some tweaks.

Prodded by espie@, krw@, guenther@