upstream: non-internal support: plfit

Origin: debian
Forwarded: https://github.com/igraph/igraph/pull/1921
Last-Update: 2022-03-16

This patch specify the folder of the `plfit` headers.
It is meant to be submitted to the upstream maintainer.

Gbp-Pq: Name upstream-external-plfit.patch

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).

[dgit import unpatched igraph 0.9.7+ds-1]

Import igraph_0.9.7+ds.orig.tar.xz

[dgit import orig igraph_0.9.7+ds.orig.tar.xz]

Import igraph_0.9.7+ds-1.debian.tar.xz

[dgit import tarball igraph 0.9.7+ds-1 igraph_0.9.7+ds-1.debian.tar.xz]