[Maria-developers] Missing man/mysql_plugin.1 in tar ball

Hi all, I've noticed that man page for mysql_plugin utility (man/mysql_plugin.1) is not present in mariadb-5.5.28a.tar.gz while it is present in mysql-5.5.28.tar.gz. However, I failed to find the reason why in case there is one. Or is that a mistake? Does anybody know? Regards, Honza