style: refine dyndns.sh and vars.example comments and formatting

dyndns.sh

@@ -17,7 +17,7 @@
 # - Validate database connectivity before command execution
 # - POSIX-compatible operation for cron and service integration
 
-# Authors: Stephan Düsterhaupt
+# Authors: Stephan Düsterhaupt, Ivo Noack aka Insonic
 # Copyright (c) 2018-2026 CB-601 - the open tec Elevator
 # License: MIT
 
@@ -398,7 +398,7 @@ set_var() {
 
 
 # SDuesterhaupt: 2026-06-18 - Write a message to the dynDNS log file.
-
+#
 #                Severity levels:
 #                  0 -> OFF
 #                  1 -> DEBUG
@@ -406,7 +406,7 @@ set_var() {
 #                  3 -> WARNING
 #                  4 -> ERROR
 #                  5 -> CRITICAL
-
+#
 #                @param1: Log message.
 #                @param2: Severity level.
 _log() {
@@ -444,7 +444,7 @@ _log() {
 
 
 # SDuesterhaupt: 2026-06-18 - Check whether DYNDNS_MEMBER_HOSTNAME is a valid hostname
-
+#
 #                Returns:
 #                  0 if valid
 #                  1 if invalid

vars.example

@@ -69,7 +69,7 @@
 # Database login credentials.
 # These are mainly used when DYNDNS_SQL_GROUP is unset/empty.
 #set_var DYNDNS_SQL_USER  "dyndns_user"
-#set_var DYNDNS_SQL_PASS  "strong_passphrase"
+#set_var DYNDNS_SQL_PASS  "<REPLACE_WITH_STRONG_PASSWORD>"
 
 # Additional database client options, if needed.
 # Example:
@@ -119,7 +119,7 @@
 #set_var DYNDNS_MEMBER_EMAIL  "admin@example24.com"
 
 # Password or shared secret used during member creation/authentication
-#set_var DYNDNS_MEMBER_PASS  "strong_passphrase"
+#set_var DYNDNS_MEMBER_PASS  "<REPLACE_WITH_STRONG_PASSWORD>"
 
 # ------------------------------------------------------------------
 # OPTIONAL COMMAND HOOKS