Merge branch 'release-1.1.23' into develop
Move sf_help() from sysfunc.sh to sf_misc.sh.

Needed because each file now generates a doc, so sysfunc.sh does not correspond to any section and cannot contain documented functions.
Fix typo in sf_save()

Bug appears when saving a path which was already saved in the past.
Merge branch 'hotfix-save' into develop
Switch version to 1.1.24
Merge branch 'release-1.1.24'