Rewrite page(2) references to page(3).
Add description of new libmach.
diff --git a/man/man3/sleep.3 b/man/man3/sleep.3
index d73f1ee..0f43e50 100644
--- a/man/man3/sleep.3
+++ b/man/man3/sleep.3
@@ -27,7 +27,7 @@
causes an
.B alarm
note (see
-.IR notify (2))
+.IR notify (3))
to be sent to the invoking process after the number of milliseconds
given by the argument.
Successive calls to
@@ -39,7 +39,7 @@
.SH SOURCE
.B /sys/src/libc/9syscall
.SH SEE ALSO
-.IR intro (2)
+.IR intro (3)
.SH DIAGNOSTICS
These functions set
.IR errstr .
