remove junk in test data
Give all the structs and vars svtest_ prefix names
(sv_parse_chunk_line): Added pulled out of sv_parse_chunk
Move fields_count from sv_parse_chunk_line arg

(sv_parse_chunk_line): Lose fields_count_p arg; make it a local.

(sv_parse_chunk): Lose var and remove it from call
(sv_parse_chunk): Given NULL buffer or 0 length, handle final line
(sv_parse_chunk): Parse final line only if buffer is not empty.
Call sv_parse_chunk at end of input for final line
(sv_parse_chunk_line): handle being called with/without final NL
Call sv_parse_chunk() a second time for final line processing
test missing final newlines on header line, data lines