fileutils: move API to std::filesystem, cleanup

Change-Id: I5408d193bda6830395bd705371c86c949643ee74
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 682501b..69cd73b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -235,9 +235,9 @@
     target_link_libraries(tests_connectionManager PRIVATE dhtnet fmt::fmt PkgConfig::Cppunit)
     add_test(NAME tests_connectionManager COMMAND tests_connectionManager)
 
-    #add_executable(tests_fileutils tests/testFileutils.cpp)
-    #target_link_libraries(tests_fileutils PRIVATE dhtnet fmt::fmt PkgConfig::Cppunit)
-    #add_test(NAME tests_fileutils COMMAND tests_fileutils)
+    add_executable(tests_fileutils tests/testFileutils.cpp)
+    target_link_libraries(tests_fileutils PRIVATE dhtnet fmt::fmt PkgConfig::Cppunit)
+    add_test(NAME tests_fileutils COMMAND tests_fileutils)
 
     #add_executable(tests_stringutils tests/testString_utils.cpp)
     #target_link_libraries(tests_stringutils PRIVATE dhtnet fmt::fmt PkgConfig::Cppunit)