It is basically for people who want their hboot to appear stock.
What was edited:
1) "TAMPERED" was removed.
2) "UNLOCKED" is masked as "LOCKED"
3) "S-OFF" is masked as "S-ON"
4) Red development text (on boot up) was removed.
Flash it in bootloader (fastboot)! Flash at own risk! (you need S-OFF obviously)
How to flash:
fastboot oem rebootRUU fastboot flash zip hboot_hexed.zip fastboot reboot-bootloader
MD5: 436aaad9df326ea7680d184988fd6f91 hboot_hexed.zip
MD5: 24917745f52b366124a3ebcd03b7c166 hboot_hexed_redonly.zip