Fix send-command to work on arm64 (#328)

Author: itzg

bin/send-command

@@ -1,7 +1,8 @@
 #!/bin/bash
 
 if [[ $* ]]; then
-  if proc=$(find /proc -mindepth 2 -maxdepth 2 -name exe -lname '/data/bedrock_server-*' -printf '%h' -quit); then
+  # On arm64, the process exe is actually box64 since it in turn wraps the bedrock_server executable
+  if proc=$(find /proc -mindepth 2 -maxdepth 2 -name exe \( -lname '/data/bedrock_server-*' -o -lname /usr/local/bin/box64 \) -printf '%h' -quit); then
     if [[ $proc ]]; then
       echo "$@" > "$proc/fd/0"
     else