coturn - Fix update function name and output nothing if no update is needed

seqs/coturn.cfg.example

@@ -4,4 +4,4 @@ sc_turnDomain="mydomain.com"
 
 # sf_ipUpdate <NEW IP>
 # Called when a new external IP is detected
-sf_ipUpdate() { :; }
+sf_updateIp() { :; }

seqs/coturn.sh

@@ -51,6 +51,8 @@ step_10() {
   local lLevelSave=${LOG_LEVEL:?}
   local lTimeSave=${LOG_TIME:-}
   local retval=0
+  local lSilent=0
+  silent && lSilent=1
 
   # Force a visible output level for this step
   if [ "${1:-}" == "-l" ]; then
@@ -82,9 +84,8 @@ step_10() {
       info "Update required (via $ipUpdater). New public ip: $pubIp"
       exe sed -i "s/^external-ip[[:space:]]*=.*/external-ip=${pubIp}/" "$toolConf"
       exe sleep 1
-      info "Restarting $toolName"
       exe /bin/systemctl restart $toolServiceName
-    else
+    elif (( ! lSilent )) ; then
       info "No update required for ${sc_turnDomain} (via $ipUpdater). Current ip: $confIp"
     fi
   fi