Remove ipv{4,6}() from todo in README

README

@@ -61,7 +61,6 @@ Todo
 Porting to OpenBSD is the current goal before thinking about a release.
 
 The following functions are not portable at the moment:
-- ipv{4,6}
 - wifi_{perc,essid}
 - cpu_{freq,perc,iowait}
 - entropy