The man page for the vfs_shadow_copy module contains the following description, which is obviously wrong: "Make a Samba share read only for a specified time" The error also appears in the following pages: https://www.samba.org/samba/docs/man/manpages/ https://www.samba.org/samba/docs/man/manpages/vfs_shadow_copy.8.html
This has been fixed with 8ca918f6 on Fri Feb 13 14:06:29 2015 +0100. Closing out bug report. Thanks for reporting!