Fix imapfetch to actually use the 'port' argument

[jimduchek]

For some reason the -P/port argument is just... not used. Fixed that.

[jsuto]

Can you please fix this error?

  File "/usr/libexec/piler/imapfetch.py", line 237, in <module>
    main()
  File "/usr/libexec/piler/imapfetch.py", line 199, in main
    conn = imaplib.IMAP4_SSL(server, port = port if port is not None else imaplib.IMAP4_PORT_SSL)
                                                    ^^^^
UnboundLocalError: cannot access local variable 'port' where it is not associated with a value

[jsuto]

This part gives an error

[jimduchek]

Fixed, will support the format: SERVER:PORT in the db, or fall back to defaults if only SERVER is specified.