pkg-config on the build host in order to detect OpenSSL compiler options.

Fixed _write() arguments.

file that was already completely downloaded caused an error, while it
doesn't if you don't use --fail! I added test case 194 to verify the fix.
Grrr. CURLOPT_FAILONERROR is now added to the list stuff to remove in
libcurl v8 due to all the kludges needed to support it.

is used at times but it doesn't decrease the array size

good. I fixed.

properly set, and the Makefile.am is now fixed to use that when building
a new package with make dist.

like that name)

properly case insensitive

both source and destination being the same host. It can be useful if you want
to move a file on a server or similar.