LF MPMC queue improvements

Small improvements of the LF MPMC queue

Making the LF MPMC queue generic and in a seperate header file

binaries/changelog.txt

@@ -20,8 +20,10 @@ Reorder helper functions
 
 v3.4: Rewriting hash_worker() to export file_hashes.txt
 
-v4.0: Instead of writing directly to file_hashes.txt, hash_workers now are using a local arena, writing everything once at the end
+3.5: Instead of writing directly to file_hashes.txt, hash_workers now are using a local arena, writing everything once at the end
 Using #pragma once to ensure that a given header file is included only once in a single compilation unit
 Forcing xxhash to use the stack instead of the heap
 Making the hashing buffer reusable instead of malloc every file
 Implementing a general purpose arena to replace small allocations
+Small improvements of the LF MPMC queue
+Making the LF MPMC queue generic and in a seperate header file