Add support for proj.h, proj_api.h is removed in PROJ 8.
Bug-Debian: https://bugs.debian.org/983254
Forwarded: https://github.com/OpenOrienteering/mapper/pull/1994
Gbp-Pq: Name proj8.patch
openorienteering-mapper (0.9.5-3.1) unstable; urgency=medium
* Non-maintainer upload.
* Add a patch to make the QPainterTest pass with Qt 5.15.9
(closes: #
1038402).
[dgit import unpatched openorienteering-mapper 0.9.5-3.1]