Host mdx1.swamid.se
        IdentityFile ~/.ssh/md
Host mdx2.swamid.se
        IdentityFile ~/.ssh/md
Host md1.swamid.se
        IdentityFile ~/.ssh/md
Host md2.swamid.se
        IdentityFile ~/.ssh/md
Host md-master.swamid.se
        IdentityFile ~/.ssh/md