accounting being saved in detail files with := attribute

[Alan DeKok]

Joe Maimon wrote:
> I recall this being brought up here recently, but I dont know if there
> is a fix in yet.
> 
> Anyways I have these pair of patches for the problem, encountered when
> using detail_reader, since it skips all AVP's with += or :=

  Ah... rather than mucking with the library and server core, it's
easier to fix the detail file reader.  I've committed a fix which makes
it care less about operators.

  Alan DeKok.