Fix -Wthread-safety-analysis warnings. Change the sync.h primitives to std from boost.

Commit 1.

This code was written by @TheBlueMatt in the following branch:
* https://github.com/TheBlueMatt/bitcoin/commits/2017-08-test-10923

This commit message was written by me (@practicalswift) who also squashed
@TheBlueMatt's commits into one and tried to summarize the changes made.

Commit 2.

Remove boost include. Remove boost mentions in comments.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/init.cpp b/src/init.cpp
index 539adc23d5..9e3eb6b926 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -544,14 +544,14 @@ static void BlockNotifyCallback(bool initialSync, const CBlockIndex *pBlockIndex
 }
 
 static bool fHaveGenesis = false;
-static boost::mutex cs_GenesisWait;
+static CWaitableCriticalSection cs_GenesisWait;
 static CConditionVariable condvar_GenesisWait;
 
 static void BlockNotifyGenesisWait(bool, const CBlockIndex *pBlockIndex)
 {
     if (pBlockIndex != nullptr) {
         {
-            boost::unique_lock<boost::mutex> lock_GenesisWait(cs_GenesisWait);
+            WaitableLock lock_GenesisWait(cs_GenesisWait);
             fHaveGenesis = true;
         }
         condvar_GenesisWait.notify_all();
@@ -1634,7 +1634,7 @@ bool AppInitMain(boost::thread_group& threadGroup, CScheduler& scheduler)
 
     // Wait for genesis block to be processed
     {
-        boost::unique_lock<boost::mutex> lock(cs_GenesisWait);
+        WaitableLock lock(cs_GenesisWait);
         while (!fHaveGenesis) {
             condvar_GenesisWait.wait(lock);
         }