fix spacing for variable assignment (#420)

fix spacing for variable assignment

debian/resources/backup/fusionpbx-maintenance

@@ -4,7 +4,7 @@
 export PGPASSWORD="zzz"
 db_host=127.0.0.1
 db_port=5432
-db_name = fusionpbx
+db_name=fusionpbx
 db_username=fusionpbx
 switch_package=true # true or false