Addition to generic.mysql.php

This supports a lane-side port argument in syncing tables.  It is essential to the way the WEFC_Toronto network is organized but may be useful to others and does not change the way things worked before or work without port arguments except to add some error reporting. It incorporates:
"Variable scoping w/ sync scripts from within class"
  .https://github.com/CORE-POS/IS4C/commit/261fddb60849857043e9ef0da32c672d8d9cf77b

If it cannot be made part of master I can have it as a local version and symlink the various table-sync modules to it.

My --COMMENTS can be removed