minor, lose gperf matching for endpoints
fix, PEBKAC, check user input in gand_req_get_xhdr() and gand_req_get_xqry()
hygiene, send final new line in error message responses
minor, lose gperf matching for output formats
Merge branch 'core/gandalfd'

* core/gandalfd:
  minor, lose gperf matching for output formats
  hygiene, send final new line in error message responses
  fix, PEBKAC, check user input in gand_req_get_xhdr() and gand_req_get_xqry()
  minor, lose gperf matching for endpoints