simplify customization of envvars

zfsbk.sh

@@ -1,10 +1,11 @@
 #! /bin/sh
 
+# change this to the name of your ZFS pool.
+zpool="zroot"
+
 # make a backup collection having 1 full and N-1 incremental backups.
 # set to 1 to avoid incrementals and always take full dumps.
 max_incremental=4
-zpool="zroot"
-destination_store="u84693@u84693.your-backup.de:calaf/"
 
 usage () {
     echo "Usage:"