- Changed the structure of SOAP request message so that it is consistent   with the SOAP response message.
- Changed the structure of SOAP request message so that it is consistent
  with the SOAP response message.

- Add several functions to retrieve the desired nid-s.  They take into
  account that the shred BATs can contain holes, although it is not
  happened yet => SOAP request/response messages are shred with
  CMDshred2bat, which does not introduce holes.  So some of them has
  only a dummy implementation, currently.

- Minor changes:
    * Add macro's to simplify code
    * Changed the signature of send_soap_err.  It was not handy to use.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb