ReadBozoFile starts threads now

Move it after InitProcs.

Change-Id: I6ced86367d8a2a368fb1c38d8571db0be5868cc9
cron_timeout: always release lock, not just on success

Change-Id: I6b675fc3bf966b143fce1f40c6515dfc8bd1a9c0
Use a write lock for bnode_SetFileGoal

We don't want to race against another caller and output an inconsistent
BosConfig.

Change-Id: I4846dd6d8a9c6016b76a47e2d6265f73edcc1cb5
bnode_Release can still call bnode_Delete

No need to copy its definition inline.

Change-Id: I34016d63c266cb1d4e3067e8cb911d7402741035