System procedures for managing multiplex dbspaces [CR 375326]

The following system procedures simplify multiplex dbspace management:

**Table 1: Multiplex stored procedures**
Procedure	Purpose
sp_iqmpxcountdbremote	Returns a count of dbremote connections for a multiplex database.
sp_iqmpxgetconnversion	Displays the version number for a specified connection.
sp_iqmpxreplacewriteserver	Converts the query server on which it runs into the new write server for the multiplex.
sp_iqmpxvalidate	Detects inconsistencies in the multiplex configuration information.
sp_iqmpxversioninfo	Displays server type (W for write server, Q for query server, S for single-node mode) and synchronization status.
sp_iqmpxcfg_<servername>	Sets up specified query server for SQL Remote replication.