change scripts back to /usr/local/plan9/bin/rc.  sigh.

man replaces 9man
diff --git a/bin/doctype b/bin/doctype
index aaad885..c55244c 100755
--- a/bin/doctype
+++ b/bin/doctype
@@ -1,4 +1,5 @@
-#!/usr/bin/env rc
+#!/usr/local/plan9/bin/rc
+
 # doctype:  synthesize proper command line for troff
 
 troff=troff