package/busybox: save shell history only on exit

Both busybox.config and busybox-minimal.config set
CONFIG_FEATURE_EDITING_SAVEHISTORY=y. This causes the Busybox shell to
write the history file after every command, which can be a problem on
storage with limited write cycles (e.g. eMMC).

Set CONFIG_FEATURE_EDITING_SAVE_ON_EXIT=y to change behavior to write
the history file only on exit, which reduces writes without losing the
history feature.

Signed-off-by: Fiona Klute (WIWA) <fiona.klute@gmx.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/busybox/busybox-minimal.config

@@ -105,7 +105,7 @@ CONFIG_FEATURE_EDITING_MAX_LEN=1024
 CONFIG_FEATURE_EDITING_VI=y
 CONFIG_FEATURE_EDITING_HISTORY=999
 CONFIG_FEATURE_EDITING_SAVEHISTORY=y
-# CONFIG_FEATURE_EDITING_SAVE_ON_EXIT is not set
+CONFIG_FEATURE_EDITING_SAVE_ON_EXIT=y
 CONFIG_FEATURE_REVERSE_SEARCH=y
 CONFIG_FEATURE_TAB_COMPLETION=y
 # CONFIG_FEATURE_USERNAME_COMPLETION is not set

package/busybox/busybox.config

@@ -108,7 +108,7 @@ CONFIG_FEATURE_EDITING_MAX_LEN=1024
 CONFIG_FEATURE_EDITING_VI=y
 CONFIG_FEATURE_EDITING_HISTORY=999
 CONFIG_FEATURE_EDITING_SAVEHISTORY=y
-# CONFIG_FEATURE_EDITING_SAVE_ON_EXIT is not set
+CONFIG_FEATURE_EDITING_SAVE_ON_EXIT=y
 CONFIG_FEATURE_REVERSE_SEARCH=y
 CONFIG_FEATURE_TAB_COMPLETION=y
 # CONFIG_FEATURE_USERNAME_COMPLETION is not set