Add "source" command; prepare removal of "autoscr" command

According to the doc/feature-removal-schedule.txt, the "autoscr"
command will be replaced by the "source" command in approximately 6
months from now.

This patch prepares this change and starts a 6 month transition
period as follows:

- The new "source" command has been added, which implements exactly
  the same functionlaity as the old "autoscr" command before
- The old "autoscr" command name is kept as an alias for compatibility
- Command sequences, script files atc. have been adapted to use the
  new "source" command
- Related environment variables ("autoscript", "autoscript_uname")
  have *not* been adapted yet; these will be renamed resp. removed in
  a separate patch when the support for the "autoscr" command get's
  finally dropped.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/include/configs/CRAYL1.h b/include/configs/CRAYL1.h
index 527c846..150bd29 100644
--- a/include/configs/CRAYL1.h
+++ b/include/configs/CRAYL1.h
@@ -74,32 +74,32 @@
 #define	CONFIG_SYS_HZ		             1000	/* decrementer freq: 1 ms ticks	*/
 #define CONFIG_SYS_HUSH_PARSER			1
 #define CONFIG_SYS_PROMPT_HUSH_PS2		"> "
-#define CONFIG_AUTOSCRIPT		1
+#define CONFIG_SOURCE			1
 
 
 /*
  * Command line configuration.
  */
 
+#define CONFIG_CMD_ASKENV
 #define CONFIG_CMD_BDI
-#define CONFIG_CMD_IMI
-#define CONFIG_CMD_FLASH
-#define CONFIG_CMD_MEMORY
-#define CONFIG_CMD_NET
-#define CONFIG_CMD_SAVEENV
 #define CONFIG_CMD_CONSOLE
-#define CONFIG_CMD_ASKENV
+#define CONFIG_CMD_DATE
+#define CONFIG_CMD_DHCP
+#define CONFIG_CMD_DIAG
 #define CONFIG_CMD_ECHO
+#define CONFIG_CMD_EEPROM
+#define CONFIG_CMD_FLASH
+#define CONFIG_CMD_I2C
+#define CONFIG_CMD_IMI
 #define CONFIG_CMD_IMMAP
+#define CONFIG_CMD_MEMORY
+#define CONFIG_CMD_NET
 #define CONFIG_CMD_REGINFO
-#define CONFIG_CMD_DHCP
-#define CONFIG_CMD_DATE
 #define CONFIG_CMD_RUN
-#define CONFIG_CMD_I2C
-#define CONFIG_CMD_EEPROM
-#define CONFIG_CMD_DIAG
-#define CONFIG_CMD_AUTOSCRIPT
+#define CONFIG_CMD_SAVEENV
 #define CONFIG_CMD_SETGETDCR
+#define CONFIG_CMD_SOURCE
 
 
 /*