Instead of the WIN32-specific workaround, detect lack of `MSG_DONTWAIT`
in the build system. This allows other platforms without `MSG_DONTWAIT`
to work too.

Define MSG_DONTWAIT and MSG_NO_SIGNAL in the implementation files that
use them (`net.cpp` and `netbase.cpp`), instead of compat.h which is
included all over the place.

This avoids putting them in the global namespace, as defining them as 0
is a hack that works for our specific usage, but it is not a general
solution.

Also makes sure they are defined only once so the `!defined(MSG_x)` guard can go.

`u_int` is not available on some platforms (not sure what standard it's
supposed to be part of), we don't use it anywhere else, and it doesn't
hurt to simply write `unsigned int` out here.

Commit 9db8eec improved the
assert_raises_jsonrpc() function for better testing of RPC failure
modes. This commit completes the job by removing remaining broken
try-except RPC testing from the individual test cases and replacing it
with calls to assert_raises_jsonrpc().

…ning

…n the default fee warning

a3ca43b [trivial] Fix a typo (introduced two days ago) in the default fee warning (practicalswift)

Tree-SHA512: b88bb45cb0cbe7f0b0c1dd5d573dad36f3915b1ddde58c9b29806544c832c4a2c0a7994080a57682684f1dea0a02d5367aed8ccbee331dbc40c45948392e0f3d

1eff6c6 fix gitian doc example typo (Lawrence Nahum)

Tree-SHA512: a43b91eb746ebee30810447a697495f97bc8ed0b052b1255b2e34b3ba9a7ca7e904ea45fe6f88029abbb461a539949139efcf5f2de7b3604114e793b27a506f5

b26ea0a specify blockchain size & default behaviour (over pruning) (Mike van Rossum)

Tree-SHA512: f21e1ea0df66500f9f899c429984e7c3de6d1cb1a216f2784061731fe22d5b8e9e48042dfc9db3c92adc6d6b6bb0c2578ca431fe5268b2a907ee2c0fdb60b4c5

fb6f90a Initialize nRelockTime (Patrick Strateman)

Tree-SHA512: 82675ab4b05d5f3ea08a99e85d3f49d18068887d23cbacb5e899ad66799049c5f1d5bd33768dbe153116424c9f0caddaa3622000924e373aa01ac2a54b5f3577

…9707)

c9bd0f6 Fix RPC failure testing (2 of 2) (John Newbery)

Tree-SHA512: df30e6e85abe8c4e12910dc60699f1201e9c243457abd738c1fdeac45f0ff05c674f68619ad9a47c847ec557954007d672cd89d3a9a3b2398dd188d9ffa6dcc9

…NOSIGNAL

a4d1c9f compat: use `unsigned int` instead of `u_int` (Wladimir J. van der Laan)
25da1ee build: cleanup: define MSG_DONTWAIT/MSG_NO_SIGNAL locally (Wladimir J. van der Laan)
c459d50 build: Probe MSG_DONTWAIT in the same way as MSG_NOSIGNAL (Wladimir J. van der Laan)

Tree-SHA512: 60d79d69439bb181465e4244aa5ddc28bbd84f69c0ca0c753956b3798c9022394e29d791bc085fe7ffb1268c64c789a57e24797daad63525bb776088188ff9ae

This adds an user configurable blocksize option, to
help the bitcoin network find a market based equilibrium.

It is mostly based on Tom Zander's commit to bitcoinclassic:
5c132f0

The clientversion stuff was borrowed from the bip100 pullrequest:
https://github.com/bitcoinxt/bitcoin/pull/1/files

This adds some warnings to the log file should there be issues with a
misconfigured block-size-accept-limit.

Also change DEFAULT_BLOCK_ACCEPT_SIZE constant from a float to an int32_t

it seems upstream unexposed mapArgs in
4cd373a

This changes mapArgs into GetArg