lwres_gai_strerror(3) on macOS

The text 107f4f8372b7, as Mac OS X 10.4.11.x86, Mac OS X 10.4.11.ppc, Mac OS X 10.4.10.x86, Mac OS X 10.4.10.ppc shipped it.

print suitable error string

lwres_gai_strerror(3) on macOS now