Added patch to fix Wformat warning.

Fixed license information.

Removed outdated iconv dependency

Placed in a submenu for readability.

Added myself as maintainer.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Upstream makes seriously infrequent updates whereas they have an active
git repository with important bugfixes.

Also fixed compilation without deprecated OpenSSL APIs.

Signed-off-by: Rosen Penev <rosenp@gmail.com>