Restructure directory layout

To make this better than the unorganized mess it used to be.

update_wg_dns

@@ -1,30 +0,0 @@
-#!/bin/bash
-
-NETWORKMANAGER_NETCONFIG="/var/run/netconfig/NetworkManager.netconfig"
-
-dns-update() {
-    tmpfile=$(mktemp)
-    sed  --regexp-extended "s/(DNSSERVERS=)'(.*?)'/\1'$@ \2'/g" "${NETWORKMANAGER_NETCONFIG}" > "${tmpfile}"
-    netconfig modify -s NetworkManager -I "${tmpfile}"
-    rm -f "${tmpfile}"
-}
-
-dns-restore() {
-    tmpfile=$(mktemp)
-    sed  --regexp-extended "s/$@ //g" "${NETWORKMANAGER_NETCONFIG}" > "${tmpfile}"
-    netconfig modify -s NetworkManager -I ${tmpfile}
-    rm -f ${tmpfile}
-}
-
-dns() {
-    local cmdname=$1; shift
-    "dns-$cmdname" "$@"
-}
-
-if declare -f "$1" >/dev/null 2>&1; then
-  # invoke that function, passing arguments through
-  "$@" # same as "$1" "$2" "$3" ... for full argument list
-else
-  echo "Function $1 not recognized" >&2
-  exit 1
-fi