[mc] glob for forge jar, but exclude installer

minecraft-server/start-minecraft.sh

@@ -211,9 +211,17 @@ function installForge {
     fi
 
     # NOTE $shortForgeVersion will be empty if installer location was given to us
-    forgeJars=$(ls *forge*$shortForgeVersion*.jar)
-    SERVER=${forgeJars/$FORGE_INSTALLER/}
-    if [ -z $SERVER ]; then
+    for j in *forge*.jar; do
+      case $j in
+        *installer*)
+          ;;
+        *)
+          SERVER=$j
+          break
+          ;;
+      esac
+    done
+    if [[ -z $SERVER ]]; then
       echo "Unable to derive server jar for Forge"
       exit 2
     fi