change "char pch[200000]" to "new char[200000]"
Issue warning if collecting RandSeed data failed
Remove timing-based signature cache unit test

Two changes:

First removes a unit test that fails in my development environment
(OSX, compiled -g3 with clang).

sipa says that's not terribly surprising; the CMutableTransaction change
makes signing a little more expensive but verification quicker. The unit
test timed sign+verify-uncached versus verify-cached-five-times.

He also says the test will be invalid when libsec256kp1 is integrated
(because validation is super-optimized over signing).

core.h change fixes a compiler warning (clang -Wall : CMutableTransaction defined
as struct, declared as class in script.h).
JSON-RPC method: prioritisetransaction <txid> <priority delta> <priority tx fee>

Accepts the transaction into mined blocks at a higher (or lower) priority
Allocate more space if necessary in RandSeedAddPerfMon

Currently we use a fixed buffer of 250000 bytes to request
HKEY_PERFORMANCE_DATA. In many cases this is not enough, causing the
entropy collection to be skipped.

Use a loop that grows the buffer as specified in the RegQueryValueEx
documentation:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms724911%28v=vs.85%29.aspx

(as the size of the performance data can differ for every call, the
normal solution of requesting the size then allocating that can't work)
Merge pull request #4414

a90689f Remove timing-based signature cache unit test (Gavin Andresen)
Merge pull request #1583

2a72d45 JSON-RPC method: prioritisetransaction <txid> <priority delta> <priority tx fee> (Luke Dashjr)
Add an option to allow users to disable relaying/mining data carrier transactions
Merge pull request #4392

8ae973c Allocate more space if necessary in RandSeedAddPerfMon (Wladimir J. van der Laan)
be873f6 Issue warning if collecting RandSeed data failed (Wladimir J. van der Laan)
fcb0a1b change "char pch[200000]" to "new char[200000]" (daniel)
Merge pull request #3715

e44fea5 Add an option to allow users to disable relaying/mining data carrier transactions (Luke Dashjr)
add GetRandBytes() as wrapper for RAND_bytes()

- add a small wrapper in util around RAND_bytes() and replace with
  GetRandBytes() in the code to log errors from calling RAND_bytes()
- remove OpenSSL header rand.h where no longer needed
move rand functions from util to new random.h/.cpp