Provide additional login information in the log.
Use kqueue/kevent for polling in MacOS.
Further optimize file descriptor exclusion.
Redo timeout handling to avoid conflicting enable() calls.
[XrdCl] Move the ttl expiration logic to socket timeout handler
[XrdCl] Bump the timestamp of last activity only upon receiving a non-timeout event
[XrdCl] Make the built-in poller re-enable timeouts