Fetch actual raw streamable URLs from various radio-station, video & podcast websites.

Changes for 2.23 - 2024-01-28

• StreamFinder::Rumble - Stop converting Rumble's "new" streaming URLs to their "old" format (initiated by v2.20) since the new URLS now seem to work properly and Rumble seems to be bandwidth-throttling the old ones, I assume to force usage of the new ones and close the hold hosts.
• StreamFinder::Bitchute - Silence cpl. stray debug messages when debug mode is not on.
• Update copyright year to 2024.