rework help messages for fee-related options

- mention the units and show the default for -paytxfee
[Qt] don't allow translation of our example btc address
Relax IsStandard rules for pay-to-script-hash transactions

Relax the AreInputsStandard() tests for P2SH transactions --
allow any Script in a P2SH transaction to be relayed/mined,
as long as it has 15 or fewer signature operations.

Rationale: https://gist.github.com/gavinandresen/88be40c141bc67acb247

I don't have an easy way to test this, but the code changes are
straightforward and I've updated the AreInputsStandard unit tests.
ensure clean and consistent "namespace" usage

- remove some missplaced ;
- ensure end of a namespace is clearly visible
- use same formatting when using namespace
small cleanup of #ifdefs in BindListenPort()

- SO_NOSIGPIPE isn't available on WIN32 so merge the 2 non-WIN32 blocks
- use predefined names from header for IPV6_PROTECTION_LEVEL and
  PROTECTION_LEVEL_UNRESTRICTED
add missing BOOST_FOREACH indentation in ThreadSocketHandler()
update coding.md to reflect changes by pull

- also mention alphabetical include ordering
Simplify build instructions
Fixed captitalization in bitcoin-cli-res.rc
RPC client: Simplify command line string-to-JSON-value conversion code

By default, all command line parameters are converted into JSON string
values.  There is no need to manually specify the incoming type.

A binary decision "parse as string or JSON?" is all that's necessary.

Convert to a simple class, initialized at runtime startup, which offers
a quick lookup to answer "parse as JSON?" conversion question.

Future parameter conversions need only to indicate the method name
and zero-based index of the parameter needing JSON parsing.
RPC cleanup: Improve HTTP server replies

1) support varying content types
2) support only sending the header
3) properly deliver error message as content, if HTTP error
4) move AcceptedConnection class to header, for wider use
RPC code movement: separate out JSON-RPC execution logic from HTTP server logic
Move AcceptedConnection class to rpcserver.h.

Also, add parens to HTTPReply() to assist readability.
Merge pull request #4424

c598f2a Fixed captitalization in bitcoin-cli-res.rc (Whit J)
Merge pull request #4288

ed5769f Move AcceptedConnection class to rpcserver.h. (Jeff Garzik)
854d013 RPC code movement: separate out JSON-RPC execution logic from HTTP server logic (Jeff Garzik)
c912e22 RPC cleanup: Improve HTTP server replies (Jeff Garzik)
rpc-tests: Fix rpcbind_test after 0193fb8

Port number for RPC is no longer static as multiple tests could be
running at once.
minor code format fix in rpc-related files
Merge pull request #4426

40a158e minor code format fix in rpc-related files (Philip Kaufmann)
Merge pull request #4208

6a5c124 [Qt] don't allow translation of our example btc address (Philip Kaufmann)
set shutdown title to main window title

- this ensures we don't show Bitcoin-Qt as that is still our
  internal application name
- fixes #4427