keyd: Update conf files to new 2.0 syntax

New config syntax uses [ids] section to select which input devices are
affected instead of file names, so we can have all settings (for
similarly set up keyboards) in a single default config file.

The file itself needs to end in `.conf` instead of the old `.cfg` and
there is a slight difference in syntax between the old `C` and the new
`control` for mapping the control key. That is about it.

bootstrap/system-packages/etc/keyd/default.conf

@@ -0,0 +1,39 @@
+# Makes capslock to control/escape
+# insert to paste
+# right alt to enable German Umlaute (äÄöÖüÜ),
+# sharp s (ß), and the Euro sign (€).
+# Needs compose key to be set in xkb to work correctly:
+# $ setxkbmap -option "compose:menu"
+
+[ids]
+
+*
+
+[main]
+
+capslock = overload(control, esc)
+insert = S-insert
+rightalt = layer(dia)
+shift = layer(shift)
+rightshift = layer(shift)
+
+[shift:S]
+
+rightalt = layer(shiftedDia)
+
+[dia]
+
+shift = layer(shiftedDia)
+rightshift = layer(shiftedDia)
+
+a = macro(compose a ")
+o = macro(compose o ")
+u = macro(compose u ")
+s = macro(compose s s)
+e = macro(compose = e)
+
+[shiftedDia]
+
+a = macro(compose A ")
+o = macro(compose O ")
+u = macro(compose U ")