Avoid use of newlocale(3) that results in increasing memory usage

--- CMakeLists.txt.orig	2026-06-27 13:44:12 UTC
+++ CMakeLists.txt
@@ -232,7 +232,7 @@ if (HAVE_LOCALE_H)
 endif()
 if (HAVE_LOCALE_H)
     check_symbol_exists(setlocale   "locale.h" HAVE_SETLOCALE)
-    check_symbol_exists(uselocale   "locale.h" HAVE_USELOCALE)
+    # check_symbol_exists(uselocale   "locale.h" HAVE_USELOCALE)
     if (NOT NIX20 AND NOT NIX13)
         # libnix does not fully support this yet
         check_symbol_exists(duplocale   "locale.h" HAVE_DUPLOCALE)
@@ -521,8 +521,6 @@ include_directories(${PROJECT_BINARY_DIR})
 
 include_directories(${PROJECT_SOURCE_DIR})
 include_directories(${PROJECT_BINARY_DIR})
-
-add_subdirectory(doc)
 
 # "uninstall" custom target for make generators in unix like operating systems
 # and if that target is not present