configure script needs an update.

[Leeman Strout]

Would the developers be so kind as to update the configure script to
probe the compiler correctly.  On a Linux (or probably BSD) system this
is not an issue since gcc is more or less *it*, however in my case
(Solaris 7) without that probe, the configure script attempts to use
'cc' as the compiler and this fails on Solaris.

I know extremely little about configure scripts, but it appears that
maildrop has a script that works perfectly in this case.


Thanks,
Leeman