Adding dpkg origin file for Progress Linux.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

debian/base-files.install

@@ -3,3 +3,4 @@ debian/local/base-files/issue.net /etc
 debian/local/base-files/motd /usr/share/base-files
 debian/local/base-files/os-release /etc
 debian/local/base-files/progress-linux_version /etc
+debian/local/dpkg/progress-linux /etc/dpkg/origins

debian/local/dpkg/progress-linux

@@ -0,0 +1,6 @@
+# /etc/dpkg/origins/progress-linux
+
+Vendor: progress-linux
+Vendor-URL: https://progress-linux.org
+Bugs: mailto:maintainers@lists.progress-linux.org
+Parent: Debian

debian/postinst

@@ -52,6 +52,13 @@ update_to_current_default() {
   fi
 }
 
+# remove debian origin default symlink
+if [ -h "$DPKG_ROOT/etc/dpkg/origins/default" ]; then
+  if [ "`readlink "$DPKG_ROOT/etc/dpkg/origins/default"`" = "debian" ]; then
+    rm -f "$DPKG_ROOT/etc/dpkg/origins/default"
+  fi
+fi
+
 if [ ! -e "$DPKG_ROOT/etc/dpkg/origins/default" ]; then
   if [ -e "$DPKG_ROOT/etc/dpkg/origins/#VENDORFILE#" ]; then
     ln -sf #VENDORFILE# "$DPKG_ROOT/etc/dpkg/origins/default"

debian/rules

@@ -10,7 +10,7 @@ ifeq ($(DEB_HOST_GNU_SYSTEM),gnu)
   OSNAME=GNU/Hurd
 endif
 
-VENDORFILE = debian
+VENDORFILE = progress-linux
 DESTDIR = debian/base-files
 
 ifneq (,$(filter $(DEB_HOST_ARCH),amd64 loong64 mips64el ppc64 ppc64el sparc64))