add drone information to multinode demo instructions

multinode-demo/common.sh

@@ -106,15 +106,17 @@ configure_metrics
 tune_networking() {
   # Reference: https://medium.com/@CameronSparr/increase-os-udp-buffers-to-improve-performance-51d167bb1360
   [[ $(uname) = Linux ]] && (
-    set -x
+    set -x +e
     # test the existence of the sysctls before trying to set them
+    # go ahead and return true and don't exit if these calls fail
     sysctl net.core.rmem_max 2>/dev/null 1>/dev/null &&
         sudo sysctl -w net.core.rmem_max=26214400 1>/dev/null 2>/dev/null
 
     sysctl net.core.rmem_default 2>/dev/null 1>/dev/null &&
         sudo sysctl -w net.core.rmem_default=26214400 1>/dev/null 2>/dev/null
+    :
   )
-  return 0
+
 }
 
 SOLANA_CONFIG_DIR=${SNAP_DATA:-$PWD}/config