Use secure URLs in package description

Also fix another reference to the old upstream host.

To do: debian/watch - appearently upstream is still FTP only.

debian/control

@@ -1,6 +1,6 @@
 Source: file
 Maintainer: Christoph Biedl <debian.axhn@manchmal.in-ulm.de>
-Homepage: http://www.darwinsys.com/file/
+Homepage: https://www.darwinsys.com/file/
 Standards-Version: 4.1.5
 Vcs-Browser: https://git.in-ulm.de/cbiedl/file
 Vcs-Git: https://git.in-ulm.de/cbiedl/file.git

debian/copyright

@@ -1,6 +1,6 @@
 Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: file
-Upstream-Contact: http://mx.gw.com/mailman/listinfo/file
+Upstream-Contact: https://bugs.astron.com/my_view_page.php
 Source: ftp://ftp.astron.com/pub/file/
 
 Files: *