--- a/Admin/Windows/Cygwin/README Sun Jul 25 16:12:23 2021 +0200
+++ b/Admin/Windows/Cygwin/README Sun Jul 25 16:38:16 2021 +0200
@@ -18,6 +18,7 @@
- https://isabelle.sketis.net/cygwin_2018 (Isabelle2018)
- https://isabelle.sketis.net/cygwin_2019 (Isabelle2019)
- https://isabelle.sketis.net/cygwin_2020 (Isabelle2020)
+ - https://isabelle.sketis.net/cygwin_2021 (Isabelle2021)
* Apache2 redirects for virtual host isabelle.conf:
```
@@ -43,6 +44,8 @@
Redirect /cygwin_2019/noarch/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/noarch/release
Redirect /cygwin_2020/x86_64/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/x86_64/release
Redirect /cygwin_2020/noarch/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/noarch/release
+ Redirect /cygwin_2021/x86_64/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/x86_64/release
+ Redirect /cygwin_2021/noarch/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/noarch/release
```
* Quasi-component: "isabelle build_cygwin" (as Administrator)