The @code{body_t} type contains a @code{header_t}, a content and
optionnaly another @code{body_t} part.

@section Init/Destroy

@deftypefun int body_init (body_t *@var{msg}, const mailbox_t @var{mbx})
Private.
@end deftypefun

@deftypefun void body_destroy (body_t *@var{msg})
The ressources allocate for clone @var{msg} are freed.
@end deftypefun

@deftypefun int body_get_header (body_t @var{msg}, header_t *@var{hdr})
@end deftypefun

@deftypefun int body_get_content (body_t @var{msg}, char *buffer, size_t len, size_t *n)
@end deftypefun

@deftypefun int body_get_type (body_t @var{msg}, char *buffer, size_t len, size_t *n)
@end deftypefun