hygiene, don't advance the cursor in parse_rcv_stmp() if the stamp couldn't be read

Signed-off-by: Sebastian Freundt <hroptatyr@fresse.org>
minor, provide parse_cspec() and snarf candle specs a la c30m in uta muxer

Signed-off-by: Sebastian Freundt <hroptatyr@fresse.org>
Merge branch 'mux/uta' into next

* mux/uta:
  minor, provide parse_cspec() and snarf candle specs a la c30m in uta muxer
  hygiene, don't advance the cursor in parse_rcv_stmp() if the stamp couldn't be read