restructured configuration (ofac.c)

- ofac.c contains now only the command in initialisation function list
- the other functions are moved to sicsutil.c
- moved DoubleTime and the content of access.c to sicsutil.c
- moved some initialisation code from ofac.c to the corresponding modules

background.c

@@ -81,7 +81,7 @@ int BackgroundAction(SConnection * pCon, SicsInterp * pSics,
 }
 
 /*--------------------------------------------------------------------------*/
-void InstallBackground(SicsInterp * pSics)
+void InstallBackground(void)
 {
-  AddCommand(pSics, "bg", BackgroundAction, NULL, NULL);
+  AddCmd("bg", BackgroundAction);
 }