join now supports a NUL field separator, e.g., "join -t '\0'".
join now detects and reports incompatible options, e.g., "join -t x -t y",
+ ls no longer outputs an extra space between the mode and the link count
+ when none of the listed files has an ACL.
+
If stdin is a terminal, nohup now closes it and then reopens it with an
unreadable file descriptor. (This step is skipped if POSIXLY_CORRECT is set.)
This prevents the command from tying up an OpenSSH session after you logout.