Comment 8 for bug 1095972

Ignacio, a bit of context on what I was saying.

Provides from a MySQL client package that ships with CentOS 5.8:
[root@centos58_01 ~]# rpm -qp mysql-5.0.95-5.el5_9.x86_64.rpm --provides
config(mysql) = 5.0.95-5.el5_9
libmysqlclient.so.15()(64bit)
libmysqlclient.so.15(libmysqlclient_15)(64bit)
libmysqlclient_r.so.15()(64bit)
libmysqlclient_r.so.15(libmysqlclient_15)(64bit)
mysql = 5.0.95-5.el5_9

Provides from a MySQL client package that ships with CentOS 6.3:
[root@centos6_01 ~]# rpm -qp mysql-5.1.67-1.el6_3.x86_64.rpm --provides
mysql = 5.1.67-1.el6_3
mysql(x86-64) = 5.1.67-1.el6_3

So if the requires of XtraBackup is changed to MySQL-client or mysql-client, then percona-xtrabackup will still have dependency issues.