feat(stop): add option to only stop server if no players (#4595)

* add no stop if players online

* remove dev message

* monitor will now restart the server if requested earlier

* changed var name

* add npm check to install gamedig

* new line

* add var

* remove from non supported servers

* typo

* word

* move restart request

* change lock file name

* restart and monitor

* refactor(stop): share player-online check + add stoponlyifnoplayersallcommands

- Extract the duplicated gamedig player-count query (previously copy-pasted
  in command_stop, command_restart and command_monitor) into a new shared
  check_players_online.sh module that sets ${playersonline}; registered in
  core_modules.sh.
- Add stoponlyifnoplayersallcommands (default on) so the stoponlyifnoplayers
  protection applies to every command that stops the server (e.g. update).
  Set to off to limit it to explicit stop/restart, allowing update to stop
  the server even while players are online.
- Add the new setting to all game server _default.cfg files.
- Resolve merge with develop (check_gamedig now keeps develop's npm-update
  branch plus the 'install Node.js' hint).

* fix(stop): clear stale restart-request lock + warn on failed player query

Addresses Copilot review feedback on #4595:
- command_restart.sh: clear the *-restart-request.lock once a restart
  actually proceeds. Previously the lock was only written when postponing
  and never removed, so every subsequent monitor run would see the stale
  lock and trigger a repeat restart indefinitely. Fixed and verified against
  a live server: postponed restart -> monitor executes it and clears the
  lock -> a second monitor run no longer restarts.
- check_players_online.sh: if the gamedig query fails for every configured
  IP (e.g. gamedig/jq missing), playersonline now still fails open (so a
  broken query can't permanently block stop/restart) but prints a clear
  warning that the safety check could not run, instead of silently
  behaving as if the server were empty.

Author: dgibbs64

lgsm/config-default/config-lgsm/ahl2server/_default.cfg

@@ -107,6 +107,10 @@ telegramthreadid=""
 telegramsilentnotification="false"
 curlcustomstring=""
 
+## Stop | https://docs.linuxgsm.com/commands/start-stop-restart
+stoponlyifnoplayers="off"
+stoponlyifnoplayersallcommands="on"
+
 ## Updating | https://docs.linuxgsm.com/commands/update
 updateonstart="off"
 

lgsm/config-default/config-lgsm/ahlserver/_default.cfg

@@ -102,6 +102,10 @@ telegramthreadid=""
 telegramsilentnotification="false"
 curlcustomstring=""
 
+## Stop | https://docs.linuxgsm.com/commands/start-stop-restart
+stoponlyifnoplayers="off"
+stoponlyifnoplayersallcommands="on"
+
 ## Updating | https://docs.linuxgsm.com/commands/update
 updateonstart="off"
 

lgsm/config-default/config-lgsm/arkserver/_default.cfg

@@ -104,6 +104,10 @@ telegramthreadid=""
 telegramsilentnotification="false"
 curlcustomstring=""
 
+## Stop | https://docs.linuxgsm.com/commands/start-stop-restart
+stoponlyifnoplayers="off"
+stoponlyifnoplayersallcommands="on"
+
 ## Updating | https://docs.linuxgsm.com/commands/update
 updateonstart="off"
 

lgsm/config-default/config-lgsm/arma3server/_default.cfg

@@ -118,6 +118,10 @@ telegramthreadid=""
 telegramsilentnotification="false"
 curlcustomstring=""
 
+## Stop | https://docs.linuxgsm.com/commands/start-stop-restart
+stoponlyifnoplayers="off"
+stoponlyifnoplayersallcommands="on"
+
 ## Updating | https://docs.linuxgsm.com/commands/update
 updateonstart="off"
 

lgsm/config-default/config-lgsm/armarserver/_default.cfg

@@ -103,6 +103,10 @@ telegramthreadid=""
 telegramsilentnotification="false"
 curlcustomstring=""
 
+## Stop | https://docs.linuxgsm.com/commands/start-stop-restart
+stoponlyifnoplayers="off"
+stoponlyifnoplayersallcommands="on"
+
 ## Updating | https://docs.linuxgsm.com/commands/update
 updateonstart="off"
 

lgsm/config-default/config-lgsm/atsserver/_default.cfg

@@ -95,6 +95,10 @@ telegramthreadid=""
 telegramsilentnotification="false"
 curlcustomstring=""
 
+## Stop | https://docs.linuxgsm.com/commands/start-stop-restart
+stoponlyifnoplayers="off"
+stoponlyifnoplayersallcommands="on"
+
 ## Updating | https://docs.linuxgsm.com/commands/update
 updateonstart="off"
 

lgsm/config-default/config-lgsm/avserver/_default.cfg

@@ -95,6 +95,10 @@ telegramthreadid=""
 telegramsilentnotification="false"
 curlcustomstring=""
 
+## Stop | https://docs.linuxgsm.com/commands/start-stop-restart
+stoponlyifnoplayers="off"
+stoponlyifnoplayersallcommands="on"
+
 ## Updating | https://docs.linuxgsm.com/commands/update
 updateonstart="off"
 

lgsm/config-default/config-lgsm/bb2server/_default.cfg

@@ -108,6 +108,10 @@ telegramthreadid=""
 telegramsilentnotification="false"
 curlcustomstring=""
 
+## Stop | https://docs.linuxgsm.com/commands/start-stop-restart
+stoponlyifnoplayers="off"
+stoponlyifnoplayersallcommands="on"
+
 ## Updating | https://docs.linuxgsm.com/commands/update
 updateonstart="off"
 

lgsm/config-default/config-lgsm/bbserver/_default.cfg

@@ -102,6 +102,10 @@ telegramthreadid=""
 telegramsilentnotification="false"
 curlcustomstring=""
 
+## Stop | https://docs.linuxgsm.com/commands/start-stop-restart
+stoponlyifnoplayers="off"
+stoponlyifnoplayersallcommands="on"
+
 ## Updating | https://docs.linuxgsm.com/commands/update
 updateonstart="off"
 

lgsm/config-default/config-lgsm/bdserver/_default.cfg

@@ -102,6 +102,10 @@ telegramthreadid=""
 telegramsilentnotification="false"
 curlcustomstring=""
 
+## Stop | https://docs.linuxgsm.com/commands/start-stop-restart
+stoponlyifnoplayers="off"
+stoponlyifnoplayersallcommands="on"
+
 ## Updating | https://docs.linuxgsm.com/commands/update
 updateonstart="off"