Fix two bugs:

- LFS_XML variable was forgotten in Config.in
- All customization to $JHALFSDIR have to be done before getting the
  {H,C,}LFS book, so that custom/config/* has to be copied before getting
  the book.

Config.in

@@ -562,6 +562,15 @@ menu "BOOK Settings"
             book sources will be copied or checked out. Do not change that
             unless you know what you are doing...
 
+        config    LFS_XML
+        string "LFS sources directory (internal parameter)"
+        default "lfs-xml"
+        depends BLFS_TOOL || BOOK_BLFS
+        help
+            The directory name under $BLFS_ROOT where the LFS
+            book sources will be copied or checked out. Do not change that
+            unless you know what you are doing...
+
         choice
         prompt    "LFS Release"
         default    LFS_SVN

jhalfs

@@ -416,12 +416,6 @@ if [[ "$REBUILD_MAKEFILE" = "n" ]] ; then
     cp extras/* $JHALFSDIR/extras
   fi
 
-# Download or updates the book source
-  get_book
-  extract_commands
-  echo "${SD_BORDER}${nl_}"
-  cd $CWD # the functions above change directory
-
 # Copy custom tools config files, if requested
   if [[ "${CUSTOM_TOOLS}" = "y" ]]; then
     echo "Copying custom tool scripts to $JHALFSDIR"
@@ -429,6 +423,14 @@ if [[ "$REBUILD_MAKEFILE" = "n" ]] ; then
     cp -f custom/config/* $JHALFSDIR/custom-commands
   fi
 
+# Download or updates the book source
+# Note that all customization to $JHALFSDIR have to be done before this.
+# But the LFS book is needed for BLFS tools.
+  get_book
+  extract_commands
+  echo "${SD_BORDER}${nl_}"
+  cd $CWD # the functions above change directory
+
 # Install blfs-tool, if requested.
   if [[ "${BLFS_TOOL}" = "y" ]] ; then
     echo Installing BLFS book and tools