Postpone .child -> .child (secure) swap to 6.e

Postponed until 6.e because there's a huge amount of ecosystem usage
and the IO::Path.add that is the alternative is too new for module
authors to reliably switch to using it.

TODO/FEATURES.md

@@ -283,26 +283,6 @@ Zoffix
 
 4 hours
 
-## Swap IO::Path.child to use .child-secure's code
-
-`.child-secure`'s code is commented out below .child's code. Per IO Grant work.
-Discussion: https://irclog.perlgeek.de/perl6-dev/2017-04-17#i_14439386
-Docs for .child-secure: https://github.com/perl6/specs/blob/master/v6d.pod
-
-See if there's a way to make even securer operations:
-
-> open the file first and then use readlink syscall on it
-
-https://irclog.perlgeek.de/perl6/2017-07-21#i_14904782
-
-### Stakeholder
-
-Zoffix
-
-### Time Required to Implement
-
-40 hours
-
 ## Make all redeclarations fatal
 
 Currently, some redeclarations are fatal, such us trying to declare two `only` subs

TODO/postponed-for-6.e.md

@@ -0,0 +1,32 @@
+
+This document contains planned changes for v6.d that we postponed until v6.e
+for various reasons.
+
+## Swap IO::Path.child to use .child-secure's code
+
+----
+
+Postponed until 6.e because there's a huge amount of ecosystem usage
+and the IO::Path.add that is the alternative is too new for module
+authors to reliably switch to using it.
+
+----
+
+`.child-secure`'s code is commented out below .child's code. Per IO Grant work.
+Discussion: https://irclog.perlgeek.de/perl6-dev/2017-04-17#i_14439386
+Docs for .child-secure: https://github.com/perl6/specs/blob/master/v6d.pod
+
+See if there's a way to make even securer operations:
+
+> open the file first and then use readlink syscall on it
+
+https://irclog.perlgeek.de/perl6/2017-07-21#i_14904782
+
+### Stakeholder
+
+Zoffix
+
+### Time Required to Implement
+
+40 hours
+