include hg repository in /dist/plan9front and install it

sys/lib/dist/mkfile

@@ -2,6 +2,8 @@ cd:V: /tmp/9front.iso
 	
 
 %.iso: pc/plan9.ini.cd
+	bind /n/src9 /n/src9/dist/plan9front
 	bind pc/plan9.ini.cd /n/src9/cfg/plan9.ini
 	disk/mk9660 -9cj -B 386/9bootiso -p /n/src9/sys/lib/sysconfig/proto/cdproto -s /n/src9 -v 'Plan 9 Front' $target
 	unmount /n/src9/cfg/plan9.ini
+	unmount /n/src9/dist/plan9front

sys/lib/rootstub

@@ -107,6 +107,7 @@ mkdir -p arm/bin/upas
 mkdir -p arm/bin/usb
 mkdir -p arm/bin/venti
 mkdir -p arm/lib/ape
+mkdir -p dist/plan9front
 mkdir -p fd
 mkdir -p lib/audio
 mkdir -p mail/faxoutqueue

sys/lib/sysconfig/proto/cdproto

@@ -1,4 +1,3 @@
-skip=.dummy
 uid=sys
 gid=sys
 adm	d775 adm adm
@@ -123,6 +122,12 @@ usr	d775
 			*
 		tmp d775
 
+dist	d775
+	plan9front d775
+		.hgignore 555
+		.hg d775
+			+
+
 LICENSE	444
 LICENSE.afpl	444
 LICENSE.gpl	444