Merge branch 'mm/sideband-ansi-sgr-colon-fix'

The sideband demultiplexer has been updated to recognize ANSI SGR escape sequences that use colon-separated subfields (e.g., for 256-color or true-color codes). * mm/sideband-ansi-sgr-colon-fix: sideband: allow ANSI SGR with colon-separated subfields