2.8.4-1

Fix hang in corner cases of alltoallv using point to point send/recv.
Harmonize error messages.
Fix missing NVTX section in the license.
Update README.

src/misc/utils.cc

@@ -67,10 +67,10 @@ ncclResult_t getHostName(char* hostname, int maxlen, const char delim) {
 }
 
 uint64_t getHash(const char* string, int n) {
-  // Based on DJB2, result = result * 33 + char
+  // Based on DJB2a, result = result * 33 ^ char
   uint64_t result = 5381;
   for (int c = 0; c < n; c++) {
-    result = ((result << 5) + result) + string[c];
+    result = ((result << 5) + result) ^ string[c];
   }
   return result;
 }