Merge branch 'develop' of github.com:ethereum/cpp-ethereum into develop

Conflicts:
	ethconsole/main.cpp

eth/main.cpp

@@ -141,6 +141,7 @@ void help()
 		<< "    --master <password>  Give the master password for the key store." << endl
 		<< "    --password <password>  Give a password for a private key." << endl
 		<< "    --sentinel <server>  Set the sentinel for reporting bad blocks or chain issues." << endl
+		<< "    --prime <n>  Specify n as the 6 digit prime number to start Frontier." << endl
 		<< endl
 		<< "Client transacting:" << endl
 		/*<< "    -B,--block-fees <n>  Set the block fee profit in the reference unit e.g. ¢ (default: 15)." << endl
@@ -292,6 +293,7 @@ int main(int argc, char** argv)
 	OperationMode mode = OperationMode::Node;
 	string dbPath;
 	unsigned prime = 0;
+	bool yesIReallyKnowWhatImDoing = false;
 
 	/// File name for import/export.
 	string filename;
@@ -425,6 +427,8 @@ int main(int argc, char** argv)
 				cerr << "Bad " << arg << " option: " << argv[i] << endl;
 				return -1;
 			}
+		else if (arg == "--yes-i-really-know-what-im-doing")
+			yesIReallyKnowWhatImDoing = true;
 		else if (arg == "--sentinel" && i + 1 < argc)
 			sentinel = argv[++i];
 		else if (arg == "--mine-on-wrong-chain")
@@ -824,6 +828,7 @@ int main(int argc, char** argv)
 		return 0;
 	}
 
+	if (c_network == Network::Frontier && !yesIReallyKnowWhatImDoing)
 	{
 		auto pd = contents(getDataDir() + "primes");
 		unordered_set<unsigned> primes = RLP(pd).toUnorderedSet<unsigned>();

ethconsole/main.cpp

@@ -21,7 +21,6 @@
 
 #include <string>
 #include <libjsconsole/JSRemoteConsole.h>
-
 using namespace std;
 using namespace dev;
 using namespace dev::eth;

libethereum/BlockChain.cpp

@@ -149,6 +149,7 @@ void BlockChain::open(std::string const& _path, WithExisting _we)
 
 	ldb::Options o;
 	o.create_if_missing = true;
+	o.max_open_files = 256;
 	ldb::DB::Open(o, path + "/blocks", &m_blocksDB);
 	ldb::DB::Open(o, path + "/details", &m_extrasDB);
 	if (!m_blocksDB || !m_extrasDB)

libethereum/EthereumHost.cpp

@@ -166,20 +166,20 @@ tuple<vector<shared_ptr<EthereumPeer>>, vector<shared_ptr<EthereumPeer>>, vector
 	vector<shared_ptr<EthereumPeer>> allowed;
 	vector<shared_ptr<Session>> sessions;
 	
-	auto const& ps = peerSessions();
-	allowed.reserve(ps.size());
-	for (auto const& j: ps)
+	size_t peerCount = 0;
+	foreachPeer([&](std::shared_ptr<EthereumPeer> _p)
 	{
-		auto pp = j.first->cap<EthereumPeer>();
-		if (_allow(pp.get()))
+		if (_allow(_p.get()))
 		{
-			allowed.push_back(move(pp));
-			sessions.push_back(move(j.first));
+			allowed.push_back(_p);
+			sessions.push_back(_p->session());
 		}
-	}
+		++peerCount;
+		return true;
+	});
 
-	chosen.reserve((ps.size() * _percent + 99) / 100);
-	for (unsigned i = (ps.size() * _percent + 99) / 100; i-- && allowed.size();)
+	chosen.reserve((peerCount * _percent + 99) / 100);
+	for (unsigned i = (peerCount * _percent + 99) / 100; i-- && allowed.size();)
 	{
 		unsigned n = rand() % allowed.size();
 		chosen.push_back(std::move(allowed[n]));