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Fix warnings flagged by the new warning option -Wunused-but-set-variable that was added to GCC 4.6 and that is enabled by -Wunused and -Wall. The option causes a warning whenever a local variable is assigned to but is later unused. It also warns about meaningless pointer dereferences.
Instance Manager - manage MySQL instances locally and remotely. File description: mysqlmanager.cc - entry point to the manager, main, options.{h,cc} - handle startup options manager.{h,cc} - manager process mysql_connection.{h,cc} - handle one connection with mysql client. See also instance manager architecture description in mysqlmanager.cc.