fdm: Update to 2.0

pkgsrc changes:
- Remove no longer needed patches

Changes:
2.0
---
- Remove Courier support
- Add `ignore-errors' flag to ignore possible delivery errors and continue to
  the next mail
- Add a `lock-timeout' option to customize default 10 seconds timeout
- Add support for STARTTLS on IMAP and POP3
- Disable OpenSSL insecure stuff enabled by default and introduce a `insecure'
  flag to replace `no-tls1'
- Add support for newer OpenSSL
- Use SNI extension (fixes some servers when OpenSSL supports TLS 1.3)
- Misc bug fixes and improvements

(leot)