Merge version 0.9.6+ds-2+rpi1 and 0.9.7+ds-1 to produce 0.9.7+ds-1+rpi1

diff --cc debian/changelog
index 0cd041c9fac59bb6986c2b762999f0d5611184c8,ecdd1c58452291e94f55573826df4e97aff03ce3..e4cf5a5ee296d434924c85057995cb86eaef0a6f
--- 1/debian/changelog
--- 2/debian/changelog
+++ b/debian/changelog
@@@ -1,9 -1,15 +1,22 @@@
- igraph (0.9.6+ds-2+rpi1) bookworm-staging; urgency=medium
++igraph (0.9.7+ds-1+rpi1) bookworm-staging; urgency=medium
 +
 +  [changes brought forward from 0.8.1+ds-1+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Sat, 04 Apr 2020 20:05:20 +0000]
 +  * Update symbols for raspbian.
 +
-  -- Raspbian forward porter <root@raspbian.org>  Tue, 11 Jan 2022 20:29:04 +0000
++ -- Raspbian forward porter <root@raspbian.org>  Fri, 08 Apr 2022 07:24:06 +0000
++
+ igraph (0.9.7+ds-1) unstable; urgency=medium
+ 
+   * New upstream nano version.
+   * Debianization:
+     - d/rules:
+       - explicitly disable LTO for the static library as LTO does
+         not really achieve anything for static libraries (thanks to
+         Timo Röhling <roehling@debian.org> for the hint).
+     - d/patches/*:
+       - d/p/upstream-external-plfit.patch, update (partially integrated).
+ 
+  -- Jerome Benoit <calculus@rezozer.net>  Wed, 16 Mar 2022 23:11:57 +0000
  
  igraph (0.9.6+ds-2) unstable; urgency=medium