add changelog entry for #18656 (#18839) [backport]

2021-09-13 18:47:33 +02:00 · 2021-09-13 18:47:33 +02:00 · ef390e6a68
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 - The allocator for Nintendo Switch, which was nonfunctional because
  of breaking changes in libnx, was removed, in favour of the new `-d:nimAllocPagesViaMalloc` option.

+- `net.parseIpAddress` now only allows IPv4 addresses in strict form as defined
+  in [RFC 6943](https://www.rfc-editor.org/rfc/rfc6943#section-3.1.1).
+  Specifically, octal numbers in IPv4 addresses are no longer accepted (before
+  they were parsed as decimal numbers).
+
 ## Standard library additions and changes

 - `strformat`: