1.1.2 "Wow It REALLY Works!"

Potentially incompatible changes:

1. Built with Go 1.18.1 using GOAMD64=v2.
2. Response to the "version" command is closer to the release version number than before. It's still not strictly correct, unfortunately.

Other improvements:

1. Missing "append" and "prepend" commands are accepted.
2. CLI flag -verbose and env var DYNACACHE_VERBOSE (uint8) for controlling the logging level.
3. Idle clients will be disconnected during normal operation.
4. Graceful server shutdown happens within a bounded time limit.
5. Repeated signals will cause an immediate shutdown.