Merge pull request #198 from fscheiner/remove-obsolete-gsi-openssh-fo…

…r-debian

Remove obsolete GSI-OpenSSH 7.5p1 for Debian

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GSI-OpenSSH w/HPN packages for Debian GNU/Linux 11 based on OpenSSH 8.4p1 are now  available from the openSUSE Build Service:

https://build.opensuse.org/package/show/home:frank_scheiner:gsi-openssh-debian-11/gsi-openssh

Repo:
https://download.opensuse.org/repositories/home:/frank_scheiner:/gsi-openssh-debian-11/Debian_11/

Follow the instructions on https://en.opensuse.org/openSUSE:Build_Service_Debian_builds#Configuring_sources.list to allow installations from this repository. The needed key is https://download.opensuse.org/repositories/home:/frank_scheiner:/gsi-openssh-debian-11/Debian_11/Release.key.