debian/patches: Add 1002_libsystemd-transition.patch. Make sure autoconf looks for the correct .pc file when search for libsystemd-dev.

debian/patches/1002_libsystemd-transition.patch

@@ -0,0 +1,11 @@
+--- a/configure.ac
++++ b/configure.ac
+@@ -115,7 +115,7 @@
+ 
+ use_systemd=no
+ if test "x$with_systemd" != "xno" ; then
+-    PKG_CHECK_MODULES(SYSTEMD, libsystemd-login, use_systemd=yes, use_systemd=no)
++    PKG_CHECK_MODULES(SYSTEMD, libsystemd, use_systemd=yes, use_systemd=no)
+ 
+     if test "x$use_systemd" = "xyes"; then
+         AC_DEFINE(HAVE_SYSTEMD, 1, [systemd support])

debian/patches/series

@@ -3,3 +3,4 @@
 0003_set-XDG-CURRENT-DESKTOP-if-empty.patch
 0004_no-crash-if-no-req-apps-found.patch
 1001_hypen-used-as-minus-sign-man-page-fix.patch
+1002_libsystemd-transition.patch