Fix typo SKD -> SDK

Fix typo SKD to SDK.

Signed-off-by: Peter Senna Tschudin <peter.senna@collabora.com>

README.md

@@ -28,7 +28,7 @@ psdk has the following options:
     		   this option once for each file you want to move to the
     		   persistent storage. Usage: psdk -e /etc/configuration.file.
     		   A backup of the original file will be at
-    		   /etc/configuration.file.PSKD. Use the original path (e.g.
+    		   /etc/configuration.file.PSDK. Use the original path (e.g.
     		   /etc/configuration.file) to make changes to a file after
     		   moving it to the persistent storage.
       -s, --scan       Scan persistent storage for configuration files and
@@ -82,7 +82,7 @@ Write Modes](https://www.virtualbox.org/manual/ch05.html#hdimagewrites) has
 more information.
 
 First step is to prepare the persistent disk on the old SDK. Start by adding a
-second disk to the old SKD. This disk should be big enough to host the contents
+second disk to the old SDK. This disk should be big enough to host the contents
 of /home and /opt: We recommend using more than 40GiB and no less than 20GiB. As
 we will use dynamically allocated VDI images the unused space does not consume
 disk space on the host, so if in doubt, create a larger disk.
@@ -196,8 +196,8 @@ the persistent storage as an example:
 Here is what psdk -e does:
 - Copy the contents of the configuration file to the persistent storage
   dereferencing symbolic links.
-- Rename the configuration file to add the .PSKD extension. So in our
-  example the backup will be at /etc/cntlm.conf.PSKD.
+- Rename the configuration file to add the .PSDK extension. So in our
+  example the backup will be at /etc/cntlm.conf.PSDK.
 - Create a symbolic link from the persistent storage to the
   configuration file.
 

tools/psdk

@@ -25,7 +25,7 @@ import tempfile
 from string import Template
 import errno
 
-BKP_EXTENSION = ".PSKD"
+BKP_EXTENSION = ".PSDK"
 DISK_LABEL = "sdk-persistent"
 MOUNT_POINT = "/run/media/persistent"
 PERSISTENT_ETC_PREFIX = "/home"