MB-30339: Log segment, file and other info on mmap failure
MB-30339: Log segment, file and other info on mmap failure

Change-Id: I0acc55639ce3c1269378fc24b25ef2b3e5cff540
Reviewed-on: http://review.couchbase.org/96360
Well-Formed: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Tested-by: Abhinav Dangeti <d73ef2279de6577f7bf081737ee47554bbb7dc82@couchbase.com>

couchbaselabs/moss