Random byte[] for start entry header to randomise tx checksum
Revert "Merge pull request #3134 from systay/new-greedy-strategy"

This reverts commit 763eaf140df6b8faefa4b244f75f86e4fbbb8747, reversing
changes made to 099f47027cfc2f7e64fb5b443b50316583fca5ee.
Merge pull request #3130 from lutovich/randomize-start-entry-checksum

[2.2] Random byte[] for start entry header to randomise tx checksum