Changes in 2.4

• Icecast protocol
• ported lenscorrection filter from frei0r filter
• large optimizations in dctdnoiz to make it usable
• ICY metadata are now requested by default with the HTTP protocol
• support for using metadata in stream specifiers in fftools
• LZMA compression support in TIFF decoder
• H.261 RTP payload format (RFC 4587) depacketizer and experimental packetizer
• HEVC/H.265 RTP payload format (draft v6) depacketizer
• added codecview filter to visualize information exported by some codecs
• Matroska 3D support thorugh side data
• HTML generation using texi2html is deprecated in favor of makeinfo/texi2any
• silenceremove filter