AddToWallet implies BindWallet

Now that AddToWallet is called when loading transactions from the
wallet database, BindWallet can be integrated into that and does not
need to be an extra step.

Leaves behaviour unchanged, but makes the
fFromLoadWallet/!fFromLoadWallet paths in AddToWallet a bit more
symmetric.
Also switch the (unused) verification code to low-s instead of even-s.

a81cd968 introduced a malleability breaker for signatures
(using an even value for S). In e0e14e43 this was changed to
the lower of two potential values, rather than the even one.
Only the signing code was changed though, the (for now unused)
verification code wasn't adapted.
Fix script test handling of empty scripts

Previously an empty script would evaluate to OP_0
Test CHECKMULTISIG with m == 0 and n == 0
added many rpc wallet tests

deleted the empty no throw test in rpc_wallet_tests line 65

fixed some comments

starting verify tests

finished verify message tests

changed some comments
Bugfix: configure: Look in libx32 subdirectory for boost libraries
Changed bitrpc.py's raw_input to getpass for passwords to conceal characters during command line input. Getpass is in Python stdlib so no additional dependencies required.
Prevent socket leak in ThreadSocketHandler.

When we are over our outbound limit ThreadSocketHandler would try to
 keep the connection if the peer was addnoded.

This didn't actually work for two reasons: It didn't actually run
 the accept code due to mistaken code flow, and because we have a
 limited number of outbound semaphores it couldn't actually use the
 connection.

Instead it leaked the socket, which might have caused issue #4034.

This patch just takes out the non-functioning white-listing for now.
Correct some proxy related socket leaks.
build: add glibc/libstdc++ back-compat stubs

glibc/libstdc++ have added new symbols in later releases. When running a new
binary against an older glibc, the run-time linker is unable to resolve the
new symbols and the binary refuses to run.

This can be fixed by adding our own versions of those functions, so that the
build-time linker does not emit undefined symbols for them.

This enables our binary releases to work on older Linux distros, while not
incurring the downsides of a fully static binary.
build: add an option for enabling glibc back-compat

Using "./configure --enable-glibc-back-compat" will attempt to be
compatible with a target running glibc abi 2.9 and libstdc++ abi 3.4.
gitian-linux: --enable-glibc-back-compat
build: add symbol for upcoming gcc 4.9's libstdc++
Improve and expand base58 comments

update comments so doxygen will pick them up
/contrib index reorg

Cleaner and easier to read.

Reordered by functionality
qt: remove de_AT translation

Got too many complaints that is was unserious and written by trolls.
I have also removed the translation from transifex.
Fixes #4054 and #3918.
[Qt] catch Windows shutdown events while client is running

- prevents unsafe shutdowns on Windows, which is known to be
  able to cause problems with wallet.dat
- if a users ends a Windows session, this will initiate a client shutdown
  and show a Windows dialog, that tells the user what is going on (for
  Windows Vista and higher it will even show a reason for blocking the
  Windows session end)
VERSION obtained from source instead of the previous git tag.

Drawback: The version string is no longer a valid git identifier.
          For this reason the 'g' short hash prefix has been removed.

Exception: When building directly from a tag this behaves exactly like the previous behavior.
           This allows formatting release versions with precision     i.e. v0.9.2
           This also allows arbitrary topicbranch names               i.e. v0.9.1-glibc-compat
Merge pull request #4049

3d20cd5 VERSION obtained from source instead of the previous git tag. (Warren Togami)
Update doc/gitian-building.md for new gitian

The patch to make it possible to configure the LXC IPs has been merged
upstream. This means that it is no longer needed to patch gitian.
Remove that workaround.