Properly check for builtin

Summary: Previously, the function to check for symbols was used, but this is wrong as builtins are not symbols.

Test Plan:
  cmake -GNinja ..

Check that the configure file now has the builtins set to 1.

Reviewers: schancel, #bitcoin_abc

Reviewed By: schancel, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D843

Update defaultAssumeValid for 0.16.1

Test Plan: Check that block hash exists in the longest valid chain. Make check and run.

Reviewers: deadalnix, #bitcoin_abc

Reviewed By: deadalnix, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D664

Update version in gitian descriptors

Summary: As per title.

Test Plan: \o/

Reviewers: schancel, freetrader, #bitcoin_abc

Reviewed By: schancel, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D630

Reenable the gitian build for window 32 bits

Summary: As per title, it also works now.

Test Plan: Do the gitian build for windows.

Reviewers: #bitcoin_abc, Mengerian, freetrader

Reviewed By: #bitcoin_abc, Mengerian

Differential Revision: https://reviews.bitcoinabc.org/D608

Update release notes for 0.15.0

Summary: Get release notes ready for next release

Test Plan: Read it over, check for mistakes or omissions

Reviewers: deadalnix, freetrader, CCulianu, #bitcoin_abc

Reviewed By: deadalnix, CCulianu, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D533

Add release notes for 0.14.6

Summary: As per title. We are on a very fast release cycle before the release, we'll slow things down a bit after.

Test Plan: read the notes :)

Reviewers: Mengerian, #bitcoin_abc, freetrader

Reviewed By: Mengerian, #bitcoin_abc, freetrader

Subscribers: freetrader

Differential Revision: https://reviews.bitcoinabc.org/D389

Update comment about consensus rule nature of SCRIPT_VERIFY_STRICTENC

Summary: There was an out-of-date comment about SCRIPT_VERIFY_STRICTENC

Test Plan: make check

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D375

Ensure that CDataStream never reads from empty buffers.

Summary: On some systems, current implementation of CDataStream sometime can read from empty buffers.

Test Plan: Added test cases. Checked with @cculianu that the test case indeed trigger the bug on some specific systems and made sure the patch fixes it.

Reviewers: CCulianu, freetrader, #bitcoin_abc

Reviewed By: CCulianu, #bitcoin_abc

Subscribers: CCulianu

Differential Revision: https://reviews.bitcoinabc.org/D355

Update URL for website and source code

Test Plan: Manual testing (open qt app, view about dialog)

Reviewers: O1 Bitcoin ABC, #bitcoin_abc, freetrader, dagurval

Reviewed By: O1 Bitcoin ABC, #bitcoin_abc, freetrader

Subscribers: deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D322

Various formatting improvement in rpc_tests.cpp

Summary: As per title.

Test Plan:
  make check

Reviewers: freetrader, sickpig, awemany, kyuupichan, #bitcoin_abc

Reviewed By: freetrader, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D304