bump libssh to libssh-0.10.6-2-g6f1b1e76

libssh 0.10.6 has a regression in IPv6 parsing, so we pick
stable-0.10 that includes the fixes.

https://gitlab.com/libssh/libssh-mirror/-/issues/227

README.md

@@ -76,7 +76,7 @@ cd mscp
 
 # prepare patched libssh
 git submodule update --init
-patch -d libssh -p1 < patch/libssh-0.10.6.patch
+patch -d libssh -p1 < patch/$(git --git-dir=./libssh/.git describe).patch
 
 # install build dependency
 bash ./scripts/install-build-deps.sh