Fix big containers losing files: When we move a file to an archive ("external" container), we need to reset its name as we won't use the full path when looking it up.
better error message with too old node.
Update jSite version and download link.
Merge remote-tracking branch 'toad/fix-big-containers-losing-files' into next

When large files are moved to external containers, /path/to/filename redirects
to [external container]/filename.

Before this fix, this caused "Not in archive" errors because the file was
stored as [external container]/path/to/filename.
Remove link to FAFS, add link to jSite homepage.
Moved long too old message from *TooOldShort to *ToOld.
Merge remote-tracking branch 'ArneBab/next' into next
Merge remote-tracking branch 'bombe/update-links-to-jsite' into next