uci: add uci_revert function

Add missing uci_revert shell function wrapper.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>
(cherry picked from commit 92ac2a20eb)

package/system/uci/Makefile

@@ -9,7 +9,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=uci
-PKG_RELEASE:=4
+PKG_RELEASE:=5
 
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/uci.git
 PKG_SOURCE_PROTO:=git

package/system/uci/files/lib/config/uci.sh

@@ -149,6 +149,14 @@ uci_remove_list() {
 	/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} del_list "$PACKAGE.$CONFIG.$OPTION=$VALUE"
 }
 
+uci_revert() {
+	local PACKAGE="$1"
+	local CONFIG="$2"
+	local OPTION="$3"
+
+	/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} revert "$PACKAGE${CONFIG:+.$CONFIG}${OPTION:+.$OPTION}"
+}
+
 uci_commit() {
 	local PACKAGE="$1"
 	/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} commit $PACKAGE