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

help.c

@@ -157,3 +157,8 @@ int SicsHelp(SConnection * pCon, SicsInterp * pSics, void *pData,
   fclose(fd);
   return 1;
 }
+/*-----------------------------------------------------------------------*/
+void HelpInit(void)
+{
+  AddCommand(pServ->pSics, "help", SicsHelp, KillHelp, NULL);
+}