fix mistake/cruft in 1.1.20 release notes
this fix was intended to be amended in before release, but somehow got
missed.
diff --git a/WHATSNEW b/WHATSNEW
index 2516be9..dad17d6 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -1919,7 +1919,7 @@
- mlock2 syscall wrapper
- memfd_create syscall wrapper
- explicit_bzero function
-- header-level support for new linux features through 4.18 ??
+- header-level support for new linux features through 4.17
- wcsftime now supports padding specifier extensions
- dynamic linker's reclaim_gaps now works on fdpic archs
- getaddrinfo now honors AI_ADDRCONFIG