update warn_msg text

Author: chuckp22

bin/ghe-host-check

@@ -144,7 +144,7 @@ if [ -z "$supported" ]; then
   exit 1
 fi
 
-if [[ "$CALLING_SCRIPT" != "ghe-backup" ]]; then
+if [[ "$CALLING_SCRIPT" == "ghe-backup" ]]; then
   # Bring in the requirements file
   min_rsync=""
   min_openssh=""
@@ -213,11 +213,11 @@ DATA_TRANSFER_SIZE
     echo "rsync version $rsync_version in backup-host does not meet minimum requirements." 1>&2
     echo "Please make sure you have the minimum required version of rsync: $min_rsync installed" 1>&2
     exit 1
-  elif awk "BEGIN {exit !($rsync_version < 3.2.5)}" &> /dev/null && [ "$RSYNC_WARNING" != "no" ]; then
-echo << WARN_MSG
+  elif [[ $rsync_version < 3.2.5 ]] && [[ $RSYNC_WARNING != "no" ]]; then
+  cat << WARN_MSG 1>&2
 **WARNING:** rsync version $rsync_version on backup host is less than 3.2.5, which could result in performance degradation.
 
-For more details, please read documentation at https://github.com/github/backup-utils/blob/master/docs/requirements.md#april-2023-update-of-rsync-requirements"
+For more details, please read documentation at https://github.com/github/backup-utils/blob/master/docs/requirements.md#april-2023-update-of-rsync-requirements
 
 You can disable this warning by changing RSYNC_WARNING to 'no' in your backup.config file.