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For change log, see: https://github.com/libical/libical/blob/v3.0.20/ReleaseNotes.txt Update license info: the source code is now licensed under MPL-2.0 instead of MPL-1.0. Remove upstreamed patches. Add a build-time dependency to host-perl. Disable unneeded options. Use ON/OFF instead of true/false for CMake options. Fixes: https://autobuild.buildroot.org/results/dc2a6d9e50759e948a5f9952eaa1a866d52400fe/ Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com> [Julien: - reword commit title - update change log url to use tag - update .checkpackageignore to fix check-package errors - reorder LIBICAL_CONF_OPTS alphabetically ] Signed-off-by: Julien Olivain <ju.o@free.fr>