* Add in-memory cache for bandwidth and space usage monitoring
* moved some structs around and added error handling for get piece size query
* added to existing bandwidth test. fixed typo
* added test, updates from PR review, added monkit for new methods
* PR review updates. renamed space used methods
* changed bw cache so that only Add updates the cache and it only overwrites when the date moves forward
* moved bandwidth usage to bw and space usage to pieceinfodb
* fixed interface comment
* removed pointer from sync.Once
* add db interface and methods, add sa metainfo endpoints and svc
* add bucket metainfo svc funcs
* add sadb bucekts
* bucket list gets all buckets
* filter buckets list on macaroon restrictions
* update pb cipher suite to be enum
* add conversion funcs
* updates per comments
* bucket settings should say default
* add direction to list buckets, add tests
* fix test bucket names
* lint err
* only support forward direction
* add comments
* minor refactoring
* make sure list up to limit
* update test
* update protolock file
* fix lint
* change per PR
* Fix some log message to actually report the number of pieces needed to
repaired for reaching the successful/optimal threshold.
* Remove some unneeded `nil` check conditional.
* design doc: path component encoding
in talks with a number of people on the team, it seems there is some
opportunity for coordination on how paths should be encoded so that
everyone works works well with each other. in particular, we care
about matching s3 semantics for list for unencrypted paths which
contain empty path components. that makes it hard to increment
and decrement keys for seek operations. additionally, there is
work to reduce our metadata overhead for storage of paths. this
proposal takes most of the ideas from that work and ensures that
it supports the ability to efficiently seek through prefixes of
paths.
* fix following and discuss c strings
* remove infodb locks and give a unique name for each in memory created.
* changed max idle and open to 1 for memory DBs. fixes table locking errors
* fixed race condition
* added file based infodb test
* added busy timeout parameter to the file based infodb for testing
* fixed imports
* removed db.locked() after merge from master
