Update to curl-7.16.3.
Fix the (still present in 7.16.3) libssh2 problems, at least so that
cURL works with the libssh2 0.17 in our ports tree.
PR: 114215 (the basic update)
Submitted by: email@example.com
Update to curl 7.16.1, loosely based on the PR. Also:
- add a LIBSSH2 option for SCP and SFTP support using security/libssh2;
- add a patch from the cURL CVS repository to fix an expired cookie in
Submitted by: Eygene Ryabinkin <firstname.lastname@example.org>