sp_mpxcfg_<servername> no longer used [CR 500307]

Table 5-8 incorrectly lists the sp_mpxcfg_<servername> procedure as sp_iqmpxcfg_<servername>.

Multiplex no longer relies on SQL Remote, so this procedure will be removed from the documentation, along with the others that use the SQL Remote functionality, in the next GA release.