Major cleanup of old Visual Studio project files, aligning engines etc
Set MYSQL_SERVER_SUFFIX from build scripts, not hard code it into Visual Studio project files, bug#15974
New VC7 project files des_key_file.cc: Visual C++ wants '"' for local include mysql.cc: Cast my_cgets() argument for VC6 and VC7 dummy.cpp: Added to convince VS .Net generate a lib for mysqlserver