bugfix: partial fix to problems with default accept parameters in content negotiator (may break other things, that's next on the list to work on); add error document return to 406 Not Acceptable response; better logging; add Packaging header to media resource responses
bugfix: partial fix to problems with default accept parameters in content negotiator (may break other things, that's next on the list to work on); add error document return to 406 Not Acceptable response; better logging; add Packaging header to media resource responses

git-svn-id: be288276da579bf930a6c6986c8ed5da68b822f6@400 2bf6ea0f-123d-0410-b71a-f1a21eb24612

fcrepo4-labs/sss,fcrepo4-archive/sss