Configure mackup

- ignore apps whose config files are in the dotfiles repo already
  (see: https://gitlab.webartifex.biz/alexander/dotfiles)
- ignore ~/.password-store as it contains symlinks
- sync various (config) files that are not be public:
  + Cisco's AnyConnect
  + history files for bash, less, python, psql, tig, and zsh
  + Gnome Nautilus' bookmarks
  + SSH config

.mackup/histories.cfg

@@ -0,0 +1,13 @@
+[application]
+name = various history files
+
+[configuration_files]
+.bash_history
+# .lesshst -> less overwrites the symlink unfortunately
+.python_history
+.tig_history
+.zhistory
+
+[xdg_configuration_files]
+# ~/.config/psql is set in ~/.psqlrc for all history files
+psql