* d/control,rules,autoreconf: Use dh-autoreconf to reconfigure UDF and HandlerSocket-Plugin-for-MySQL sub-projects, fixing FTBFS on ppc64el. * d/control: Align Provides/Breaks/Replaces/Conflicts to virtual-mysql-* approach for switching in/out MySQL alternatives. * d/control: Add lsb-release to BD's. * d/additions/pxc.cnf,percona-xtradb-cluster-common-5.5.install: Add PXC specific configuration to /etc/mysql/conf.d to disable MySQL query cache (LP: #1290331). * d/control: Drop dependency on libmysqlclient18 - not used.