** Bug fixes
+ nohup now sets the close-on-exec flag for it's copy of the stderr file
+ descriptor. This avoids some nohup-induced hangs. For example, before
+ this change, if you ran `ssh localhost', then `nohup sleep 600 </dev/null &',
+ and then exited that remote shell, the ssh session would hang until the
+ 10-minute sleep terminated. With the fixed nohup, the ssh sessions
+ terminates immediately.
+
`expr' now conforms to POSIX better:
Integers like -0 and 00 are now treated as zero.