Spotted by Venkatesh Srinivas <me@endeavour.zapto.org>

Unify copyright notices.

Use 'unsigned char' rather than 'char' for pchMessageStart.

Qualify make_tuple with boost:: namespace.

Regarding https://bitcointalk.org/index.php?topic=28022.0



main.cpp has: "char pchMessageStart[4] = { 0xf9, 0xbe, 0xb4, 0xd9 };"
Per discussion on the thread linked, leaving the signedness of
pchMessageStart is unsafe for values > 0x80. This patch specifies
'unsigned char' in main.cpp and net.h.
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

db.cpp has a number of uses of make_tuple and has 'using namespace
std' and 'using namespace boost'. Without qualifying make_tuple,
std::make_tuple is preferred, which is incorrect. This patch qualifies
make_tuple.
Signed-off-by: Jeff Garzik <jgarzik@exmulti.com>

Signed-off-by: Jeff Garzik <jgarzik@exmulti.com>

To a variation on:
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2011 The Bitcoin developers

This is needed for the script unit tests.

There were some problems with the existing testing setup:

 - Makefile rules for test-file compilation used CFLAGS instead of
   CXXFLAGS in makefile.unix

Check for duplicate txins in CheckTransaction.

avoid strAddress + validity checks

Identify as "Bitcoin + version number" when mapping UPnP port

Don't listen if on TOR (resolves #441).

Avoid references to addresses using strings, and use CBitcoinAddress
as much as possible. Also added some validity checks on addresses
entered using RPC.

Translation from "Open Bitcoin" to "Verstuur Bitcoins"

Makes Bitcoin identify itself as "Bitcoin + version number" instead of
the nondescript "libminiupnpc" when forwarding a port via UPnP.

Comment "deprecated"

Fix EncryptKeys crash introduced by a9ba4710, identified by TD.

Fixes issue #424

Bugfix: don't overuse limited ExtractAddress