MFH: r509719

finance/py-python-bitcoinlib: Update to 0.10.2

Changelog:

• New RPC "generatetoaddress(self, numblocks, addr)"
• Fixed Python 2.7 incompatibility
• Various OpenSSL fixes, including a memory leak

Note:

This will be the last release of finance/python-bitcoinlib with Python 2.7
compatibility.

Approved by: ports-secteam (miwi)