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

--- CMakeLists.txt.orig	2022-04-14 01:09:51 UTC
+++ CMakeLists.txt
@@ -198,7 +198,7 @@ if (HAVE_STDLIB_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)
 endif()
 if (HAVE_STRINGS_H)
     check_symbol_exists(strcasecmp  "strings.h" HAVE_STRCASECMP)
@@ -432,8 +432,6 @@ configure_file(json.h.cmakein ${PROJECT_BINARY_DIR}/js
 
 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