[gparted] Document new requirement on the cryptsetup command (#774818)

[Curtis Gedak <gedakc src gnome org>]

commit 34185afbf135bf2f168296c0e000010a582e1220
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Thu Oct 27 14:33:11 2016 +0100

    Document new requirement on the cryptsetup command (#774818)
    
    Bug 774818 - Implement LUKS read-write actions NOT requiring a
                 passphrase

 README       |    3 ++-
 src/Utils.cc |    2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/README b/README
index c0f1a37..9c4b2e8 100644
--- a/README
+++ b/README
@@ -240,7 +240,8 @@ following command is required:
    mdadm           - SWRaid administration tool
 
 
-For LUKS read-only support the following command is required:
+For LUKS support the following commands are required:
+   cryptsetup      - LUKS volume administration tool
    dmsetup         - Device-mapper administration tool
 
 
diff --git a/src/Utils.cc b/src/Utils.cc
index 6b6c168..a429950 100644
--- a/src/Utils.cc
+++ b/src/Utils.cc
@@ -359,7 +359,7 @@ Glib::ustring Utils::get_filesystem_software( FILESYSTEM filesystem )
                case FS_JFS         : return "jfsutils" ;
                case FS_LINUX_SWAP  : return "util-linux" ;
                case FS_LVM2_PV     : return "lvm2" ;
-               case FS_LUKS        : return "dmsetup";
+               case FS_LUKS        : return "cryptsetup, dmsetup";
                case FS_NILFS2      : return "nilfs-utils" ;
                case FS_NTFS        : return "ntfs-3g / ntfsprogs" ;
                case FS_REISER4     : return "reiser4progs" ;