[ssh] Fix b0rken redirected sockets and just use one per customer VM

bin/executable_fix-ssh-socket

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Override the tmux ssh auth sock with the most current version
+SSH_TMUX_SOCK="${HOME}/.ssh/ssh_auth_sock"
+LATEST_SSH_SOCK=$(ls -t1 /tmp/ssh-*/agent.* | head -n 1)
+ln -sf "$LATEST_SSH_SOCK" "$SSH_TMUX_SOCK"
+export SSH_AUTH_SOCK="${SSH_TMUX_SOCK}"

dot_tmux.conf

@@ -50,6 +50,7 @@ set -g automatic-rename on
 set -g automatic-rename-format '#{b:pane_current_path}'
 
 set -g update-environment "SSH_ASKPASS SSH_AUTH_SOCK SSH_AGENT_PID SSH_CONNECTION"
+set -g update-environment SSH_AUTH_SOCK="$HOME/.ssh/ssh_auth_sock"
 
 # Blinky linky
 set -gw monitor-activity on

dot_zshrc.tmpl

@@ -59,12 +59,6 @@ alias cm-private="chezmoi -S ~/.local/share/chezmoi-private"
 timestamp() { date +%Y-%m-%d-%H%M%S }
 letterup() { take $1 && cp -a ~/Documents/Personal/Brief-Vorlage/2017-LaTeX/* .; }
 
-# Override the tmux ssh auth sock
-SSH_TMUX_SOCK="${HOME}/.ssh/ssh_auth_sock"
-if [ "${SSH_AUTH_SOCK}" != "${SSH_TMUX_SOCK}" ] && [ "${SSH_AUTH_SOCK}" != "" ]; then
-    ln -sf "$SSH_AUTH_SOCK" "$SSH_TMUX_SOCK"
-fi
-
 # Pretty up FZF
 export FZF_DEFAULT_OPTS='
   --prompt=" "