Rename tgz to arc in scripts/backup

tgz looks silly when you hack the script to use something other than
tar+gzip.

diff --git a/scripts/backup b/scripts/backup
index 2c90df76587f9d3375697258e5065c2fd3ef6a7b..20a2a6abbc7609d14e44c416cc287288d9c19660 100755 (executable)
--- a/scripts/backup
+++ b/scripts/backup
@@ -52,8 +52,8 @@ remote_email=
 mkdir -p $local_dir
 
 # Tar up the data directory
-tgz=$local_dir/$name.tar.gz
-tar czf $tgz .
+arc=$local_dir/$name.tar.gz
+tar czf $arc .
 
 # Copy the backup to another machine with SSH, in the background
 #
@@ -63,11 +63,11 @@ tar czf $tgz .
 # user's privileges are carefully limited.
 if [ "$remote_host" ]
 then
-    nohup sh -c "scp -qBp '$tgz' '$remote_host:$remote_dir' 2>&1 | mail -e -s 'Empire backup save failed' '$email'" </dev/null >/dev/null 2>&1 &
+    nohup sh -c "scp -qBp '$arc' '$remote_host:$remote_dir' 2>&1 | mail -e -s 'Empire backup save failed' '$email'" </dev/null >/dev/null 2>&1 &
 fi
 #
 # A more secure alternative is to replace the scp command by something like
-#    ssh -q -T -o BatchMode=yes -o IdentitiesOnly=yes -i "$HOME/.ssh/empire_id_rsa" $remote_host <"$tgz"
+#    ssh -q -T -o BatchMode=yes -o IdentitiesOnly=yes -i "$HOME/.ssh/empire_id_rsa" $remote_host <"$arc"
 # where $HOME/.ssh/empire_id_rsa contains a private key specifically
 # created for Empire backup, without a passphrase, and authorized_keys
 # on $remote_host contains the matching public key prepended by