Revert "Merge branch 'pr3764' into dev"

This reverts commit 0d9a372e49, reversing
changes made to 1a04bf2904.

src/backend/common/Thread.h

@@ -65,7 +65,7 @@ public:
         }
     }
 #   else
-    inline ~Thread() { if (m_thread.joinable()) { m_thread.join(); } delete m_worker; }
+    inline ~Thread() { m_thread.join(); delete m_worker; }
 
     inline void start(void *(*callback)(void *))    { m_thread = std::thread(callback, this); }
 #   endif

src/backend/opencl/cl/cn/cryptonight.cl

@@ -706,7 +706,7 @@ __kernel void cn2(__global uint4 *Scratchpad, __global ulong *states, __global u
     }
 
 #   if (ALGO_FAMILY == FAMILY_CN_HEAVY)
-    /* Also left over threads perform this loop.
+    /* Also left over threads performe this loop.
      * The left over thread results will be ignored
      */
     #pragma unroll 16
@@ -1005,7 +1005,7 @@ __kernel void Groestl(__global ulong *states, __global uint *BranchBuf, __global
         ulong State[8] = { 0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0UL, 0x0001000000000000UL };
         ulong H[8], M[8];
 
-        // BUG: AMD driver 19.7.X crashes if this is written as loop
+        // BUG: AMD driver 19.7.X crashs if this is written as loop
         // Thx AMD for so bad software
         {
             ((ulong8 *)M)[0] = vload8(0, states);

src/backend/opencl/cl/cn/wolf-skein.cl

@@ -10,7 +10,7 @@
 #else
 #   define STATIC
 /* taken from https://www.khronos.org/registry/OpenCL/extensions/amd/cl_amd_media_ops.txt
- * Built-in Function
+ * Build-in Function
  *     uintn  amd_bitalign (uintn src0, uintn src1, uintn src2)
  *   Description
  *     dst.s0 =  (uint) (((((long)src0.s0) << 32) | (long)src1.s0) >> (src2.s0 & 31))

src/backend/opencl/cl/kawpow/kawpow.cl

@@ -77,7 +77,7 @@ void keccak_f800_round(uint32_t st[25], const int r)
 void keccak_f800(uint32_t* st)
 {
     // Complete all 22 rounds as a separate impl to
-    // evaluate only first 8 words is wasteful of registers
+    // evaluate only first 8 words is wasteful of regsters
     for (int r = 0; r < 22; r++) {
         keccak_f800_round(st, r);
     }
@@ -181,7 +181,7 @@ __kernel void progpow_search(__global dag_t const* g_dag, __global uint* job_blo
         for (int i = 10; i < 25; i++)
             state[i] = ravencoin_rndc[i-10];
 
-        // Run initial keccak round
+        // Run intial keccak round
         keccak_f800(state);
 
         for (int i = 0; i < 8; i++)