Add mkfile to keep indices up to date.

Remove man pages for things we don't provide.
diff --git a/man/mkfile b/man/mkfile
new file mode 100644
index 0000000..cbe7170
--- /dev/null
+++ b/man/mkfile
@@ -0,0 +1,8 @@
+LIB=$PLAN9/lib
+
+indices:V:
+	for i in man*
+	do
+		./secindex $i > $i/INDEX
+	done
+