[source] uci: add missing 'option' support to uci_rename()

[LEDE Commits]

jow pushed a commit to source.git, branch master:
https://git.lede-project.org/a367645f23d2ed93ea29c7237fa1b2d6c3ded7e4

commit a367645f23d2ed93ea29c7237fa1b2d6c3ded7e4
Author: Tony Ambardar <itugrok at yahoo.com>
AuthorDate: Tue Apr 25 02:16:56 2017 -0700

    uci: add missing 'option' support to uci_rename()
    
    When using the uci.sh wrapper, allow parameters to match those supported
    by the uci binary i.e. "uci rename <config>.<section>[.<option>]=<name>".
    
    Signed-off-by: Tony Ambardar <itugrok at yahoo.com>
---
 package/system/uci/files/lib/config/uci.sh | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/package/system/uci/files/lib/config/uci.sh b/package/system/uci/files/lib/config/uci.sh
index 50891a6..78ec277 100644
--- a/package/system/uci/files/lib/config/uci.sh
+++ b/package/system/uci/files/lib/config/uci.sh
@@ -118,9 +118,10 @@ uci_add() {
 uci_rename() {
 	local PACKAGE="$1"
 	local CONFIG="$2"
-	local VALUE="$3"
+	local OPTION="$3"
+	local VALUE="$4"
 
-	/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} rename "$PACKAGE.$CONFIG=$VALUE"
+	/sbin/uci ${UCI_CONFIG_DIR:+-c $UCI_CONFIG_DIR} rename "$PACKAGE.$CONFIG${VALUE:+.$OPTION}=${VALUE:-$OPTION}"
 }
 
 uci_remove() {