Bug#915868: perl: Consider updating stable to perl 5.24.4

[Dominic Hargreaves]

Source: perl
Version: 5.24.1-3+deb9u5
Severity: wishlist

In the jessie release cycle we decided to upload a maintenance
release of 5.20.x, which was quite successful (though we noted a full
archive rebuild would be needed in the future), due to one regression.

Considering a similar process for stretch, upstream is up to
5.24.4, so it would be interesting to analyse the delta between these
two releases, to see if there are any changes which would benefit our
users.