Added support for xmllint on start to avoid issues with silent errors

Scripts/7D2D-Manage.bash

@@ -1,6 +1,5 @@
 #!/bin/bash
 
-
 echo_rgb() {
     # Echo a colored string to the terminal based on rgb values
     #
@@ -221,7 +220,6 @@ start_server() {
 
     backup_configs "${server_directory}"
 
-
     local server_port
     server_port="$((START_PORT_RANGE + server_id))"
 
@@ -258,6 +256,18 @@ start_server() {
 
     mv "temp-serverconfig.xml" "${server_config}"
 
+    # xmllint, helps avoiding the random server launch failures for apparently no reason
+    if which xmllint >/dev/null 2>&1; then
+        for xml_file in "${server_directory}"/*.xml; do
+            log "info" "Linting $(important "${xml_file}")..."
+            if ! xmllint "${xml_file}" > /dev/null; then
+                log "error" "Xml parsing error in ${xml_file}, resolve the error and attempt to start again"
+            fi
+        done
+    else
+        log "warning" "$(important "xmllint") not installed or not in PATH, skipping lint check"
+    fi
+
     log "info" "Starting $(important "${server_name}") located at $(important "${server_directory}") on port $(important "${server_port}")"
 
     if tmux has-session -t "${server_session_name}" >/dev/null 2>&1; then
@@ -506,7 +516,6 @@ backup() {
 
     [[ -z "${server_id}" ]] && log "error" "No server id passed" && exit 1
 
-
     # Kill the server to ensure a smooth backup
     kill_server -s "${server_id}" >/dev/null 2>&1
 
@@ -626,7 +635,6 @@ usage() {
     Exposes options to backup 7 Days To Die Servers, pass -h to it for details"
 }
 
-
 main() {
     # Parse input arguments
     #