minor, pair FILTER_LAST with FILTER_FRST
minor, snarf filter argument and do actual filtering in filter_*() routines
chore, adapt default filter string in API's gand_get_series()
minor, don't send off the `filter' parameter if no valflavs are given
Merge branch 'endpnt/series'

* endpnt/series:
  minor, don't send off the `filter' parameter if no valflavs are given
  chore, adapt default filter string in API's gand_get_series()
  minor, snarf filter argument and do actual filtering in filter_*() routines
  minor, pair FILTER_LAST with FILTER_FRST
chore, check for zlib.h (and assume -lz is there somewhere as well)
minor, support compression of gbuf just prior to enqueuing it
minor, transparently upgrade gbuf to compressed encoding if Accept-Encoding indicates that
Merge branch 'core/httpd'

* core/httpd:
  minor, transparently upgrade gbuf to compressed encoding if Accept-Encoding indicates that
  minor, support compression of gbuf just prior to enqueuing it
  chore, check for zlib.h (and assume -lz is there somewhere as well)