ServerConfig::validate() checked the flat [rig]/[audio]/[behavior] fields and
gave [[rigs]] entries only an id/audio-port uniqueness pass, and
validate_sdr() returned early unless the *flat* access type was "sdr". A
multi-rig SDR station therefore got no Nyquist, stream_opus, duplicate-decoder
or tx_enabled checking at all, and a rig entry with frame_duration_ms = 7 or a
missing baud rate started and failed at runtime.
Move the per-rig rules into validate_rig_instance() and validate_sdr_instance()
and run them over resolved_rigs(), which already synthesises the flat layout as
a single entry. Both layouts now go through the same code, and multi-rig
messages name the rig they came from.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SyX26FCpMQxiBoC7r5K1A7
Signed-off-by: Stan Grams <sjg@haxx.space>