Log Message:
Update to 1.13.

Relevant changes since version 1.12:

Net::POP3
- Make more compliant. +OK and -ERR responses do not have to be followed
by a space.

Net::FTP
- Fix unique name extraction to pick up name on initial

Net::Cmd
- Compatibility fix for 5.004

Net::Cmd
- Ensure all debug output is via ->debug_print

Net::FTP
- Allow the user to specify a local address to use for sockets

Net::SMTP
- Avoid extra spaces on the end of the AUTH command