Restructure directory layout

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

misc/update_wg_dns

@@ -0,0 +1,30 @@
+#!/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