Add ZoneMinder::Control::Dahua_RPC, a PTZ control module driving Amcrest Smart Home (ASH21/ASH42/ADC2W) and Dahua cameras over the JSON-RPC /RPC2 interface, since their cgi-bin API is disabled and ONVIF exposes no PTZ service. Two-stage MD5-challenge login with session reuse and self-healing re-login; continuous pan/tilt + diagonals, stop, presets, zoom, focus, reboot.
Adds a generic 'Dahua/Amcrest RPC' Controls row plus model-specific rows for the ASH21-B (pan/tilt only) and ADC2W (reboot only), the ASH21-B/ADC2W models, migration zm_update-1.39.11.sql, and a login-hash unit test.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
