[PATCH] Warning about configure args (weaker version)

Here's a weaker version of the previous patch. Rather than aborting, it
simply prints a warning about any unrecognised options, just before the
end:

checking thread safety of required library functions... yes
*** Option ignored: --enable-depends
configure: creating ./config.status
...etc...

Have a nice day,
--
Martijn van Oosterhout   <kleptog@svana.org>   http://svana.org/kleptog/
> From each according to his ability. To each according to his ability to litigate.