Change of config-variables
Add: Support for encrypted transfers.
Add: Support for +port to properly support output from search_ftp.
Add: Support for a skiplist
Fix: More narrow exception-catch in main loop.
Fix: Proper support for resuming transfers.
Fix: Will cancel transfer after 5 attempts and not enter a infinite loop.
Fix: 'replace-str' option changed to 'replace'.
Fix: 'ftp-url' option changed to 'url' for consistency.
Fix: Options now use underscores instead of dashes to make it more consistent with other plugins.
Fix: Other small fixes in path-handling