/dev/null
Some bash versions may not have that option and rather than checking if
they even have it or if it is set, just quiet the STDERR it may throw.
```
$ kssh myhost
bash: shopt: inherit_errexit: invalid shell option name
myhost:~$ bash --version
GNU bash, version 4.3.48(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
```
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