mingw32 builds make .a libs

libs built with libtool are named .la in the build dir

if --enable-ares is used, we must run 'buildconf' in the ares dir before
we run configure.

added Borland support.

fixed Win32 prebuild section; fixed minor cosmetic bug.

be a bit more verbose when things go wrong.

added additional check to avoid calling a non-existant external script.

the simple way was too simple, so added --mktarball option.

added simple way to create a tarball just before the build is deleted.

changed to reflect recent NetWare makefile changes;
moved call to buildconf.bat down so that it takes place in the build dir.

fixed argument parsing; added --setup option.

added new --target option for autobuilding other targets than GNU-like.

Tor Arntsen fixed how this is invoked

detect daily snapshots using the new path for this test

invoke this script via env, as it is more likely to exist at a fixed path
while perl often is installed in /usr/local/bin or elsewhere

Tor Arntsen's mkdir-fix to make this run with perl 5.0005

Avoid doing chdir .., as it breaks the ability to use symlinks properly.
chdir to absolute directory names instead. (this flaw exists in the shell
version too)

Greg Hewgill's version of testcurl.sh rewritten in perl for greater
portability. I put it in this directory instead of the root since I think
perhaps it makes more sense.