Don't depend on read/open errors to decide when we're done.
Merge branch 'develop' into logging

Conflicts:
	src/config/config_def.c
	src/include/flags.h
	src/include/wiredtiger.in
Merge branch 'develop' into logging
Set first_lsn offset to 0.  Make local copy of close_fh.
Merge branch 'logging' into fine-grained-durability