www/nginx-module-vod: Update to 1.10.0

Adds DASH accessibility support and HLS I-frame playlists for fMP4,
fixes the subrequest buffer allocation with proxy_cache and the manifest
durations after keyframe-aligned clipping, and refactors the code onto
the current nginx conventions.

Upstream now requires nginx 1.23 and FFmpeg 5.1 as a minimum. Both
are met by the nginx ports and by multimedia/ffmpeg.

Changes: https://github.com/dio-az/nginx-vod-module/releases/tag/v1.10.0
Sponsored by: Netzkommune GmbH