Minimap2-2.24 (r1122)

This release improves alignment around long poorly aligned regions. Older
minimap2 may chain through such regions in rare cases which may result in
missing alignments later. The issue has become worse since the the change of
the chaining algorithm in v2.19. v2.23 implements an incomplete remedy. This
release provides a better solution with a X-drop-like heuristic and by enabling
two-bandwidth chaining in the assembly mode.

(2.24: 26 December 2021, r1122)