Changed bitrpc.py's raw_input to getpass for password input
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.
Use glibc compat. Removes the static linux builds as this enables compatibility with older distros again.
Note about translations
build: add symbol for upcoming gcc 4.9's libstdc++
Update expected hashes
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] 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)
Update Doxyfile
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