maybe I'am the only plan9 user in the UK with a UK keyboard but
ctrl-\ was missing, which is annoying when using con(1).

Reference: /n/sources/patch/applied/uk-kbmap-fix
Date: Tue Jan 31 16:10:12 CET 2012
Signed-off-by: steve@quintile.net

--- /sys/lib/kbmap/uk	Tue Jan 31 16:08:57 2012
+++ /sys/lib/kbmap/uk	Tue Jan 31 16:08:53 2012
@@ -4,4 +4,5 @@
 1	4	'£
 1	40	'@
 0	86	'\
+4	86	^\
 1	86	'|