Add config for mackup

- ignore apps whose config files are in the `dotfiles` repo
  (see: https://gitlab.webartifex.biz/alexander/dotfiles)
- include various (config) files that should not be public:
  + Cisco's AnyConnect
  + history files for `bash`, `less`, `python`, `psql`, `tig`, and `zsh`
  + Nautilus' bookmarks
  + SSH config & known hosts

.psqlrc

@@ -20,6 +20,10 @@
 -- Use the best text editor in the world
 \set EDITOR vi
 
+-- Use separate history files per database
+-- and keep them in one folder for easier sync with `mackup`
+\set HISTFILE ~/.config/psql/.psql_history- :DBNAME
+
 -- Don't store the same SQL statement repeatedly
 \set HISTCONTROL ignoredups