Add ssh_config

Private parts are in a separate, non-included file.

setup.sh

@@ -52,6 +52,10 @@ have tmux && link_file tmux .config/tmux ../
 have vim && link_file vim .config/vim ../
 have youtube-dl && link_file youtube-dl .config/youtube-dl ../
 have zsh && link_file zshrc .zshrc
+if have ssh; then
+	mkdir -p $HOME/.ssh
+	link_file ssh_config .ssh/config ../
+fi
 
 if test x"$(uname -s)" = x"Darwin"; then
 	dest="$HOME/Library/Keyboard Layouts/eu_US.keylayout"

ssh_config

@@ -0,0 +1,15 @@
+Include config.private
+
+Host bitbucket.org
+	HostKeyAlgorithms ssh-rsa
+
+Host github.com
+	HostKeyAlgorithms rsa-sha2-512
+
+Host wip.pkgsrc.org
+	Ciphers aes256-gcm@openssh.com
+
+Host *
+	Ciphers chacha20-poly1305@openssh.com
+	KexAlgorithms curve25519-sha256@libssh.org
+	HostKeyAlgorithms ssh-ed25519