[BUG] Rust server map wiped during daily auto restart

I run a daily auto restart script and after updating to the most recent LGSM, the server wiped the map with a seed of 1337 during a normal restart.

## Basic info

* **Distro:** Centos 7
* **Game:** Rust
* **Command:** rustserver start
* **LinuxGSM version:** v21.2.2

## Further Information

After updating to the latest lgsm, the config is no longer injecting +server.seed into the server command line or the +server.salt.

./RustDedicated -batchmode +server.ip 104.129.133.251 +server.port 28015 +server.tickrate 30 +server.hostname "BattleZone | Solo Only | 2X Vanilla | Wiped 3/11" +server.identity "rustserver" +server.maxplayers 100 +server.worldsize 3500 +server.saveinterval 600 +rcon.web 1 +rcon.ip 104.129.133.251 +rcon.port 28016 +rcon.password "" -logfile "/home/solo/log/server/rustserver-game-2021-03-16-07:16:20.log"

To fix, I went into my lgsm rustserver.cfg and manually added +server.seed to the command line and removed the conditional variables

## To Reproduce

Steps to reproduce the behaviour:
1. Updated LGSM to latest version
2. Stopped rust server
3. Started rust server
4. +server.seed is now missing from the server command line

## Expected behaviour
+server.seed being added to the command line so the server doesn't wipe to seed 1337 when no seed variable is passed over.