(loosely priority-ordered)

# Test improvements.
  - disconnect behavior ('disconnect' branch)
  - SSL (if SSLify present)
  - peer-to-peer zlib

# Optional idle timer for outgoing Connector-spawned Connects.

# Optionally skip ircmsg() and dispatch raw events from _ircsock_input

# IP blacklisting for Listeners
  - per-backend and/or per-listener

# Expose more SSLify functions
  - Role for Connects ?
  - $conn->ssl_object -> GetSSL (or undef if ssl == 0)
  - $conn->ssl_cipher -> GetCipher (or '' if ssl == 0)
  - $conn->get_socket -> GetSocket if ssl == 1 (else ->wheel->get_input_handle)
