Merge remote-tracking branch 'lp-anj7/expanded-rules' into 7.0

* lp-anj7/expanded-rules:
  Generate module version files with new RULES_EXPAND facilities
  Extend RULES_EXPAND to add more features
  More generator doc updates
  Document <library>_API = <stem> for Makefiles
  Convert epicsShareAPI to epicsStdCall in modules/ca
  Update generator script
  Modify rules to allow multiple API.h libraries to be built
  Convert modules/ca to use LIBCA_API instead of epicsShare
  Try out a representative sample of APIs from multiple libraries
  Add build rules to generate and install *API.h header files
  Add script to generate *API.h headers

modules/ca/src/client/CASG.cpp

@@ -18,7 +18,6 @@
 
 #include "errlog.h"
 
-#define epicsExportSharedSymbols
 #include "iocinf.h"
 #include "syncGroup.h"
 #include "oldAccess.h"