• Add --test mode to ease initial setup
• Don't do an initial run when daemonizing (the default), this is mostly so we
  can keep a clean schedule and prevent issues if the config is temporarily wrong,
  or the server is unreachable for some reason
• Use POSIX commandline flags (double dash instead of single dash, shorthand flags)
  instead of Go's flag approach
• Added support for specifying sslmode when connecting, and default to "prefer"
  • This also fixes an issue where beforehand we required SSL to always be present
  • For maximum security you might want to set this to "require" or "verify-full"
• Re-introduced all required statistics currently used by pganalyze