not supporting it. It hasn't been functioning for years anyway, so this is just finally stating what already was true. And a cleanup at the same time.
It now properly handles code that uses curl_free() (since not all versions of curl have it), and also fixes a few problems when detecting libcurl on MinGW, and a linker problem on OSX Panther.
use to detect libcurl and setup variables for the protocols the installed libcurl supports: docs/libcurl/libcurl.m4