add stuff from old newlib to todo

src/todo/oldlib/dns/answer.rs

src/todo/oldlib/dns/mod.rs

src/todo/oldlib/dns/query.rs

src/todo/oldlib/event.rs

src/todo/oldlib/file.rs

src/todo/oldlib/folder.rs

src/todo/oldlib/hostname.rs

src/todo/oldlib/lib.rs

src/todo/oldlib/macros.rs

src/todo/oldlib/mallocnull.rs

src/todo/oldlib/netdb.rs

src/todo/oldlib/process.rs

src/todo/oldlib/rawfile.rs

src/todo/oldlib/redox.rs

src/todo/oldlib/socket.rs

src/todo/oldlib/termios.rs

src/todo/oldlib/time.rs

src/todo/oldlib/types.rs

src/todo/oldlib/unimpl.rs

src/todo/oldlib/user.rs