Fix can't import block bench 5.x format issue (1.16-1.21)
Fix big network packet send/receive issue (3.2.x-beta)
NOTE: 1.16.5 requires java 16 now.
NOTE: this bug will cause the skin (>30k) always downloading, pls upgrade it.
Fix can't load skin in some case (1.16-1.21)
NOTE: 1.16.5 requires java 16 now.
