Drop connections that cause sending failures
- [API, FEATURE] Close connection immediately when
ea_packets_out()fails witherrno != EAGAIN. The API change is that errno is now examined. Make sure to set it if using something other thansendmsg()to send packets. - [CLEANUP] Immediate close logic in IETF full conn.
- [CLEANUP] Fix bogus warning about uninitialized `pair' variable.