Log Message:
pkgtools/pkglint: update to 19.4.7

Changes since 19.4.6:

HOMEPAGE definitions that use http no longer get a warning that they
should migrate to https. Those that could be migrated have been migrated,
and the remaining homepages are not yet ready, so there's no benefit in
having this warning by default. Only in --network mode and when the https
site is indeed reachable, the warning is shown.

In long continued lines, the continuation backslash should be preceded by
a single space. Pkglint had wrongly removed that space in a few cases
before.