Deb: use deb-sys-maint user credentials to configure MariaDB plugins

On systems with unix socket authentication root could run these
without any special maintenance accounts.

debian/mariadb-plugin-mroonga.postinst

@@ -5,7 +5,7 @@ set -e
 # Install Mroonga
 # No user or password parameter is required with new MariaDB that
 # has unix socket authentication support by default.
-mysql < /usr/share/mysql/mroonga/install.sql || true
+mysql --defaults-file=/etc/mysql/debian.cnf < /usr/share/mysql/mroonga/install.sql || true
 # Always exit with success instead of leaving dpkg in a broken state
 
 

debian/mariadb-plugin-mroonga.prerm

@@ -5,7 +5,7 @@ set -e
 # Install Mroonga
 # No user or password parameter is required with new MariaDB that
 # has unix socket authentication support by default.
-mysql < /usr/share/mysql/mroonga/uninstall.sql || true
+mysql --defaults-file=/etc/mysql/debian.cnf < /usr/share/mysql/mroonga/uninstall.sql || true
 # Always exit with success instead of leaving dpkg in a broken state
 
 

debian/mariadb-plugin-spider.postinst

@@ -5,7 +5,7 @@ set -e
 # Install Spider
 # No user or password parameter is required with new MariaDB that
 # has unix socket authentication support by default.
-mysql < /usr/share/mysql/install_spider.sql || true
+mysql --defaults-file=/etc/mysql/debian.cnf < /usr/share/mysql/install_spider.sql || true
 # Always exit with success instead of leaving dpkg in a broken state