Not all debug logging is compiled out of release builds

Was investigating a CBSE and noticed that the logs contain some debug-level messages (even though this is a release build) but not others.

The problem is that Logging.hh is not disabling enough debug-level logging macros in release builds. The block at line 195 commenting "// Debug(...) is stripped out of release builds" disables `Debug(...)`, which is an obsolete name. It should be disabling `LogDebug(...)` and `WriteDebug(...)`.

The Poller.cc file also calls `LogToAt(WSLog, Debug, ...)` which is not compiled away.

Note that these calls still won't log anything unless the appropriate log level is cranked all the way up to Debug. It's just that they still generate code.