This module will have the following behavior:
1) when readonly is checked, write bits will be removed.
2) when it is unchecked, write bits will be added (up to the mode specified in Samba's create and directory masks).
3) remaining DOS modes will be mapped to chflags() flags.
4) when enabled, setting ACL will be disabled.
5) access will be denied to share if extended ACL is present of the share's connect path.