aria2 1.18.4 released

aria2 is a lightweight multi-protocol & multi-source, cross platform download utility operated in command-line. It supports HTTP/HTTPS, FTP, BitTorrent and Metalink.

This release adds new RPC authorization mechanism using --rpc-secret
option. The existing --rpc-user and --rpc-passwd options are now
deprecated, and all applications using RPC API is strongly encouraged
to migrate to the new mechanism. See RPC INTERFACE section in aria2
manual page for the details. The new RPC method, aria2.saveSession,
was added, which tells aria2 server to save session file immediately.
There are several enhancements and bug fixes. See the changes for the
details.