Create MessageDigestHelper::staticSHA1DigestInit() which uses
statically declared sha1 MessageDigestContext.
* src/BtPieceMessage.cc: Use staticSHA1DigestInit() to avoid
initialization of short-lived MessageDigestContext.
* src/MessageDigestHelper.{h, cc}
* src/main.cc
Now DownloadCommand has a reference to MessageDigestContext to avoid
the initialization of MessageDigestContext every time in validating
chunk checksum.
* src/DownloadCommand.{h, cc}
Implemented BitTorrent/http/ftp integrated download.
I've rewritten lots of files and now some headers have forward
class declarations to reduce compile time.
The implementation is extremely alpha stage, I recommend to use this
for testing purpose only.
Tatsuhiro Tsujikawa