dpkg: drop more locale files

.hgrc: dp1 and dp2 aliases to diff for sanity-checks of merges An extra alias "d" is needed to make sure `hg d` still works after we add other commands starting with "d". `--from` and `--to` are hg 5.7+, they provide clearer UI, but you can still use `hg diff -r foo -r bar`.

.vimrc: set noundofile just to be sure

mangohud: histogram seems to be the usual fps frametime graph, but filled

mangohud: cpu_power usually works

.hgrc: show merge diffs (experimental, hg 5.8+)

htop: show CPU frequency, it's a cheap enough statistic on Ryzens

keyboard: RIP rwin, I guess Hard to find a keyboard with the right Meta key. Luckily, with lv3:ralt_switch_multikey you can press Shift+Right Alt instead.

fj: remove due to bitrot

.bashrc: lsof-deleted to find processes that might need restarting