Merge branch 'cherry-pick-7f1e357a-LCG_107-patches' into 'LCG_107-patches'

Sweeping !2852 from master to LCG_107-patches: setup.[c]sh: add MARIADB_PLUGIN_DIR for the mariadb / mysql client to find plugin libraries

See merge request !2858

cmake/scripts/create_lcg_view_setup_csh.in

@@ -419,6 +419,7 @@ if ( -f $thisdir/bin/mariadb_config ) then
     set mysql_dir=`readlink $thisdir/bin/mariadb_config`
     set mysql_dir=`dirname $mysql_dir`
     setenv MYSQL_HOME `dirname $mysql_dir`
+    setenv MARIADB_PLUGIN_DIR $MYSQL_HOME/lib/plugin
 endif
 
 #---then Apache Ant

cmake/scripts/create_lcg_view_setup_sh.in

@@ -359,6 +359,7 @@ fi
 #---then MySQL
 if [ -f $thisdir/bin/mariadb_config ]; then
     export MYSQL_HOME=$(dirname $(dirname $(readlink $thisdir/bin/mariadb_config )))
+    export MARIADB_PLUGIN_DIR=$MYSQL_HOME/lib/plugin
 fi
 
 #---then Apache Ant