Fossil

  zName = vmprintf(zFormat, ap);
  va_end(ap);
  db_unset(zName/*works-like:"x"*/, iGlobal);
  fossil_free(zName);
}

/*
** Get a setting that is taylored to subsystem.  The return value is
** Get a setting that is tailored to subsystem.  The return value is
** NULL if the setting does not exist, or a string obtained from mprintf()
** if the setting is available.
**
** The actual setting can be a comma-separated list of value of the form:
** The actual setting can be a comma-separated list of values of the form:
**
**    *   VALUE
**    *   SUBSYSTEM=VALUE
**
** A VALUE without the SUBSYSTEM= prefix is the default.  This routine
** returns the VALUE that with the matching SUBSYSTEM, or the default
** VALUE if there is no match.