less memory allocation and be more efficient

src/lib66/backup_cmd_switcher.c

src/lib66/db_compile.c

src/lib66/instance.c

src/lib66/rc_init.c

src/lib66/resolve.c

src/lib66/resolve_graph.c

src/lib66/ssexec_enable.c

src/lib66/tree_cmd_state.c

src/lib66/tree_get_permissions.c