Update comment

src/random.h

@@ -18,7 +18,7 @@ void RandAddSeed();
 void RandAddSeedPerfmon();
 
 /**
- * Functions to gather random data via the OpenSSL PRNG
+ * Functions to gather random data via the libsodium PRNG
  */
 void GetRandBytes(unsigned char* buf, size_t num);
 uint64_t GetRand(uint64_t nMax);