This code could be replaced more neatly with an MCStringFormat (especially as you can't call Append methods on a non-mutable MCStringRef):
```
MCAutoStringRef t_filename;
if (p_file[0] != '/')
  /* UNCHECKED */ MCStringFormat(&t_filename, "%s/%s", MCservercgidocumentroot, p_file);
else
  /* UNCHECKED */ MCStringCreateWithCString(p_file, &t_filename);
```