Stop compiling for darwin/386

Refactor frame reception processor

Code style clean up

Default StreamTimeout to 300 seconds

Update dependencies in README.md

Fix nil pointer with ClientInfo

Fix wrong condition for isAdmin

Differentiate concrete types of LimitedValve and UnlimitedValve to av…

…oid unnecessary atomic.AddUint64 since it has non-trivial overhead on embedded systems

Remove UID from backup file name to fix cbeuw#38

Fix a missing IPv6 bracket