threading: add temporary semaphore aliases

src/sync.h

@@ -348,6 +348,9 @@ public:
     }
 };
 
+using BinarySemaphore = CSemaphore;
+using Semaphore = CSemaphore;
+
 /** RAII-style semaphore lock */
 class CSemaphoreGrant
 {
@@ -427,4 +430,7 @@ public:
     }
 };
 
+using BinarySemaphoreGrant = CSemaphoreGrant;
+using SemaphoreGrant = CSemaphoreGrant;
+
 #endif // BITCOIN_SYNC_H