Rationale:

There isn't any real doubt about what these operators are supposed to do, but we ought to spell it out.

[ Kona: Matt provided wording. ]

Proposed resolution:

Add the following new paragraphs after [list.cons] paragraph 3:

  operator!=

Returns: x.c != y.c

  operator>

Returns: x.c > y.c

  operator<=

Returns: x.c <= y.c

  operator>=

Returns: x.c >= y.c

Add the following paragraphs at the end of [list.modifiers]:

  operator==

Returns: x.c == y.c

  operator<

Returns: x.c < y.c

  operator!=

Returns: x.c != y.c

  operator>

Returns: x.c > y.c

  operator<=

Returns: x.c <= y.c

  operator>=

Returns: x.c >= y.c

Sections [list.cons] and [list.modifiers] list comparison operators (==, !=, <, <=, >, =>) for queue and stack. Only the semantics for queue::operator== ([list.cons] par2) and queue::operator< ([list.cons] par3) are defined.