Proposed resolution:

This wording is relative to N4606

1. Insert the signature into [ostream], class template basic_ostream synopsis, as follows:

   [Drafting notes: Why member? Don't want to define a new category of inserters just for this.]

   namespace std {
     template <class charT, class traits = char_traits<charT> >
     class basic_ostream
       : virtual public basic_ios<charT, traits> {
     public:
       […]
       basic_ostream<charT, traits>& operator<<(const void* p);
       basic_ostream<charT, traits>& operator<<(nullptr_t);
       basic_ostream<charT, traits>& operator<<(
         basic_streambuf<char_type, traits>* sb);
       […]
     };
   

2. Append the following new paragraphs to [ostream.inserters]:

   basic_ostream<charT, traits>& operator<<
     (basic_streambuf<charT, traits>* sb);
   

   […]

   -10- Returns: *this.

   basic_ostream<charT, traits>& operator<<(nullptr_t);
   

   -??- Effects: Equivalent to return *this << s; where s is an implementation-defined NTCTS.