FindPostgreSQL: automatically find installations from yum.postgresql.org
In commit v3.3.0-rc1~4^2 (FindPostgreSQL: Search some more common packaging locations) the PostgreSQL_ADDITIONAL_SEARCH_PATHS variable was removed. This was used e.g. by osm2pgsql to be able to build on CentOS with recent PostgreSQL versions. At least add those locations from yum.postgresql.org, which is a more or less official location.
pgsql-yum1 job for