document the umask setting.

conf/umtprd.conf

@@ -9,14 +9,51 @@
 loop_on_disconnect 0
 
 # Force the default UID/GID to use for each storage file operations.
-# Note : When no default UID/GID are specified the umtprd process UID/GID 
+# Note : When no default UID/GID are specified the umtprd process UID/GID
 #        are used instead.
 
 #default_uid 33
+
+## group: mtp
 #default_gid 33
 
+#
+# umask value for uploaded folders and files
+#
+# Uncomment the umask command line if you want to
+# override the system default umask value for
+# the uploaded folders and files.
+#
+# umask format description :
+#
+# umask 022
+#       ugo
+#
+# u : user/owner part of mask
+# g : group part of mask
+# o : others/not-in-group part of mask
+#
+# Octal digit definition in umask command :
+#
+# 0 : Any permission may be set. (Read, Write, eXecute)
+# 1 : Setting of execute permission is prohibited. (Read and Write)
+# 2 : Setting of write permission is prohibited. (Read and eXecute)
+# 3 : Setting of write and execute permissions is prohibited. (Read only)
+# 4 : Setting of read permission is prohibited. (Write and eXecute)
+# 5 : Setting of read and execute permissions is prohibited. (Write only)
+# 6 : Setting of read and write permissions is prohibited. (eXecute only)
+# 7 : All permissions are prohibited from being set. (No permission)
+#
+
+# Example :
+# User   : Read, Write, eXecute.       (0)
+# Group  : Read, eXecute but no Write. (2)
+# Others : Read, eXecute but no Write, (2)
+
+#umask 022
+
 # Storage command : Create add a storage entry point. Up to 16 entry points supported
-# Syntax : storage "PATH" "NAME" "OPTIONS" 
+# Syntax : storage "PATH" "NAME" "OPTIONS"
 # Possible store options :
 #     "rw" = read/write access
 #     "ro" = read only
@@ -36,14 +73,6 @@ storage "/"      "lockable root folder" "rw,locked"
 
 storage "/home/user" "user folder" "rw,locked,uid=33,gid=33"
 
-#
-# Uncomment the following line if you want to 
-# override the system default umask value for 
-# the uploaded files.
-#
-
-#umask 022
-
 # Set the USB manufacturer string
 
 manufacturer "Viveris Technologies"
@@ -87,7 +116,7 @@ usb_dev_version 0x3008
 # user un-plugged a non-battery-powered device too soon when there are still buffered data
 # stayed in the RAM
 
-# sync_when_close 0x0 
+# sync_when_close 0x0
 
 #
 # Internal buffers size