I did add a symlink as in the attached patch and postfix builds again. I
don't have a good way to do run-time testing, so I don't know if there are any
further changes needed, but this at least fixes package building.
Please consider.
Scott K
--- mariadb-10.3-10.3.11/debian/libmariadb-dev.links 2018-12-24 13:53:14.000000000 +0000
+++ mariadb-10.3-10.3.11.new/debian/libmariadb-dev.links 2018-12-28 09:19:35.244259344 +0000
@@ -1 +1,2 @@
usr/share/man/man1/mysql_config.1.gz usr/share/man/man1/mariadb_config.1.gz
+usr/include/mariadb/ usr/include/mysql
