sbin/hammer: Add debug prints while scanning node during recovery
Prints "zone2offset nodetype elmnum elmtypes" with -d.
Prints "zone2offset -" for invalid offsets in addition to above with -dd.
-- example
...
20000000207fd000 -
20000000207fe000 -
20000000207ff000 -
2000000020800000 L 2 RR
mkinode (dir) /tmp/xxxxx/PFS00000
2000000020801000 I 52 LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
2000000020802000 L 32 RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR
mkdir /tmp/xxxxx/PFS00000/obj_0x0000000100010590
...