pam_mount does not mount the volumes that contain defined control attributes

[Eduardo Santos de Moraes]

The pam_mount module does not mount the volumes that contain defined control attributes (user, pgrp, sgrp, uid, and gid).

I believe that it simply ignores all volume tags that contain this control, because even with debug enable ="1" nothing is registered in syslog. Only volumes that are defined without any type of control attribute work and produce information in the log.

Example:

It works:

 <volume fstype="cifs" server="FILESERVER" path="SHARE$" mountpoint="~/SHARE" options="gid=MYGROUP,file_mode=0770,dir_mode=0770" />

It does not work:

 <volume sgrp="MYGROUP" fstype="cifs" server="FILESERVER" path="SHARE$" mountpoint="~/SHARE" options="gid=MYGROUP,file_mode=0770,dir_mode=0770" />

It has been tested in the following environments:

* Ubuntu 18.04.2 LTS
* libpam-mount 2.16-3ubuntu0.1

* Ubuntu 19.04
* libpam-mount:amd64 2.16-9ubuntu2