doc: minor corrections in random.cpp

This should have been part of bitcoin#17151.

Author: fanquake

src/random.cpp

@@ -13,7 +13,7 @@
 #include <wincrypt.h>
 #endif
 #include "logging.h"  // for LogPrint()
-#include "sync.h"
+#include "sync.h"     // for Mutex
 #include "utiltime.h" // for GetTime()
 
 #include <stdlib.h>
@@ -716,7 +716,7 @@ bool Random_SanityCheck()
     uint64_t start = GetPerformanceCounter();
 
     /* This does not measure the quality of randomness, but it does test that
-     * OSRandom() overwrites all 32 bytes of the output given a maximum
+     * GetOSRand() overwrites all 32 bytes of the output given a maximum
      * number of tries.
      */
     static const ssize_t MAX_TRIES = 1024;

src/random.h

@@ -52,7 +52,6 @@
  * sources used in the 'slow' seeder are included, but also:
  * - 256 bits from the hardware RNG (rdseed or rdrand) when available.
  * - (On Windows) Performance monitoring data from the OS.
- * - (On Windows) Through OpenSSL, the screen contents.
  * - Strengthen the entropy for 100 ms using repeated SHA512.
  *
  * When mixing in new entropy, H = SHA512(entropy || old_rng_state) is computed, and