Fix Gnome bitcoin: URI handler
Fix multi-block reorg transaction resurrection
Make RPC password resistant to timing attacks

Fixes issue#2838; this is a tweaked version of pull#2845 that
should not leak the length of the password and is more generic,
in case we run into other situations where we need
timing-attack-resistant comparisons.
Revert "Truncate oversize 'tx' messages before relaying/storing."

This reverts commit 7cc960f8f57e7fe90ee7aa0ccd3e3c6c89ec5a25.
Simplify storage of orphan transactions

Orphan transactions were stored as a CDataStream pointer;
this changes the mapOrphanTransactions data structures to
store orphans as a CTransaction.

This also fixes CVE-2013-4627 by always re-serializing
transactions before relaying them.
Checkpoint at block 250,000