follow renaming of various Isabelle command-line tools (see b975f5aaf6b8 and before);
Cygwin
======
* https://www.cygwin.com/
* Mirror with many old versions (not setup.ini)
https://ftp.eq.uc.pt/software/pc/prog/cygwin
* Local snapshots:
- http://isabelle.in.tum.de/cygwin (Isabelle2012)
- http://isabelle.in.tum.de/cygwin_2013 (Isabelle2013)
- http://isabelle.in.tum.de/cygwin_2013-1 (Isabelle2013-1 and Isabelle2013-2)
- http://isabelle.in.tum.de/cygwin_2014 (Isabelle2014)
- http://isabelle.in.tum.de/cygwin_2015 (Isabelle2015)
- http://isabelle.in.tum.de/cygwin_2016 (Isabelle2016)
- http://isabelle.in.tum.de/cygwin_2016-1 (Isabelle2016-1)
- http://isabelle.in.tum.de/cygwin_2017 (Isabelle2017)
- 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)
- https://isabelle.sketis.net/cygwin_2021-1 (Isabelle2021-1)
- https://isabelle.sketis.net/cygwin_2022 (Isabelle2022)
* Apache2 redirects for virtual host isabelle.conf:
```
Redirect /cygwin/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/release
Redirect /cygwin_2013/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/release
Redirect /cygwin_2013-1/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/release
Redirect /cygwin_2013-1/x86/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/x86/release
Redirect /cygwin_2014/x86/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/x86/release
Redirect /cygwin_2015/x86/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/x86/release
Redirect /cygwin_2015/x86_64/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/x86_64/release
Redirect /cygwin_2016/x86/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/x86/release
Redirect /cygwin_2016/x86_64/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/x86_64/release
Redirect /cygwin_2016-1/x86/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/x86/release
Redirect /cygwin_2016-1/noarch/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/noarch/release
Redirect /cygwin_2017/x86/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/x86/release
Redirect /cygwin_2017/x86_64/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/x86_64/release
Redirect /cygwin_2017/noarch/release http://ftp.eq.uc.pt/software/pc/prog/cygwin/noarch/release
Redirect /cygwin_2018/x86/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/x86/release
Redirect /cygwin_2018/x86_64/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/x86_64/release
Redirect /cygwin_2018/noarch/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/noarch/release
Redirect /cygwin_2019/x86/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/x86/release
Redirect /cygwin_2019/x86_64/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/x86_64/release
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
Redirect /cygwin_2021-1/x86_64/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/x86_64/release
Redirect /cygwin_2021-1/noarch/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/noarch/release
Redirect /cygwin_2022/x86_64/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/x86_64/release
Redirect /cygwin_2022/noarch/release https://ftp.eq.uc.pt/software/pc/prog/cygwin/noarch/release
```
* Quasi-component: "isabelle component_cygwin" (as Administrator)
* SSH server:
- run Cygwin terminal as Administrator
- run ssh-host-config
```
StrictMode: yes
privilege separation: yes
new local account 'sshd': yes
sshd as a service: yes
different name (than cyg_server): no
new privileged account cyg_server: yes
```
- user setup
```
mkpasswd -l > /etc/passwd
mkgroup -l > /etc/group
passwd -R USER
```