Dynamic DNS add option for verbose logging

This will allow the user to decide if they want all the noise in syslog. It defaults to off, so the log messages will quieten down unless the user turns it on.
Dynamic DNS add option for verbose logging

Put most log messages inside "if verbose logging". Things that are always logged are actual errors and success messages when something is done (or finally determined to not need doing).
Dynamic DNS add option for verbose logging

The verbose log option is "set or not set" in the config and needs to be passed to subroutines as a boolean true or false.
Note: This just works in services_dyndns_edit because the in-memory array of settings is keeping it as a boolean.
Merge pull request #495 from phil-davis/master

Dynamic DNS add option for verbose logging