Global code ovehaul - remove CAS and other, add 15 minute greet check

- Remove CAS, as it no longer works for us
- Remove other checks
- Implement 15 minute greet timeout check
- Fix chat logos
- Ditch thirdparty logger, use stdlib log facility wrapper for logging

internal/moon/signals_unix.go

@@ -0,0 +1,25 @@
+//go:build !windows
+
+package moon
+
+import (
+	"os"
+	"syscall"
+)
+
+// terminationSignals are the signals that ask the bot to shut down.
+func terminationSignals() []os.Signal {
+	return []os.Signal{syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT}
+}
+
+// reopenSignals are the signals that ask the bot to re-open its log file.
+//
+// SIGHUP is the conventional daemon signal for "re-read your configuration and
+// re-open your logs"; SIGUSR1 is the other common choice for log re-opening
+// alone. Both are accepted so the bot fits either convention an operator's
+// logrotate configuration expects.
+func reopenSignals() []os.Signal {
+	return []os.Signal{syscall.SIGHUP, syscall.SIGUSR1}
+}
+
+/* vim: set ft=go noet ai ts=4 sw=4 sts=4: */