Added new windows configuration


VC++Files/client/mysqlclient.dsp:
  Added new configuration
VC++Files/zlib/zlib.dsp:
  Added new configuration
libmysql/libmysql.c:
  Moved check function from libmysql.c to client.c
sql-common/client.c:
  Moved check function from libmysql.c to client.c