* Introduced 'label' primitive: it is a variable length string equivalent
  of tag and tag2 primitives. Its value can be set via 'set_label' in a
  pre_tag_map (see examples/pretag.map.example). If, ie. as a result of
  JEQ's in a pre_tag_map, multiple 'set_label' are applied, then default
  operation is append labels and separate by a comma.
* fix, nfacctd: when nfacctd_time_new was set to false (default) plugins
  were reporting incorrect query number (QN) in their concluding line of
  purge reports. Only 1.5.0 CVS releases are affected.
* Updated docs