patch 8.0.1236: Mac features are confusing
Problem: Mac features are confusing.
Solution: Make feature names more consistent, add "osxdarwin". Rename
feature flags, cleanup Mac code. (Kazunobu Kuriyama, closes #2178)
diff --git a/src/config.h.in b/src/config.h.in
index fe68d49..e692d40 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -212,6 +212,7 @@
#undef HAVE_USLEEP
#undef HAVE_UTIME
#undef HAVE_BIND_TEXTDOMAIN_CODESET
+#undef HAVE_MBLEN
/* Define, if needed, for accessing large files. */
#undef _LARGE_FILES