ADDED: library(sandbox): writeln/1 as safe.
Updated jpl
FIXED: qsave_program/2 failed with autoload(false)

The cleanup in commit 8f6a3ee28795c0bed893974ad07d0122be67b81c caused
qsave_program/2 to fail anytime the autoload option was set to false.
This restores the intended behavior of skipping autoload/0 in that case.
Merge branch 'master' of github.com:SWI-Prolog/swipl-devel