Log Message:
Update to 1.16.3

Changelog:
aria2 1.16.3
============

Release Note
------------

This release fixes the bug which causes random crash. It also fixes
socket option setting failure on Windows platform.

Changes
-------

* Fix failure to set TCP_NODELAY on Windows

  On Windows setting TCP_NODELAY after non-blocking connect fails at
  least on Windows 7.

* Fix invalid iterator handling when deleting RequestGroup

aria2 1.16.2
============

Release Note
------------

This release fixes the bug which causes long running BitTorrent
download to stall. The several new options have been added.

Changes
-------

* Check SSL_OP_NO_COMPRESSION is available before using it

* Fix bug returnPeer is not called if sequence_ == INITIATOR_SEND_KEY

  In InitiatorMSEHandshakeCommand, when aborting connection, we must
  return peer to the PeerStorage. But it is not done if sequence_ is
  INITIATOR_SEND_KEY. This causes stale Peer objects whose usedBy()
  returns true eventually occupies peer list and aria2 cannot make any
  connections.

* Accept k and m as well as K and M in util::getRealSize()

* mingw32: Make NTFS sparse file on --file-allocation=trunc

* Added --save-session-interval option

  --save-session-interval option saves error/unfinished downloads to a
  file specified by --save-session option every SEC seconds. If 0 is
  given, file will be saved only when aria2 exits.

* Use request URI as referer if --referer="*" is given

* Log warn if unknown option is found in config file or -i file

* Added --console-log-level option

  --console-log-level option sets log level to output to console.