v5.3.2

• Fix: Restore backward compatibility for hook config sections named
  [namespace-subsection]. After 5.3.1 anchored section matching strictly on
  :, downstream hooks (notably mxmake) that emit [mxmake-env]-style
  sections broke. The matcher now accepts the historical - delimiter too,
  logging a one-time deprecation warning per offending section. Hook classes
  that declared a trailing delimiter in their namespace (e.g. namespace = "mxmake-")
  are normalized: the trailing - is stripped and the hook author is warned.
  Migration: rename [ns-section] to [ns:section] and set namespace = "ns".
  [jensens]