Small fix for ucontext(3)

[Francis GUDIN]

Hello,

The attached diff fixes a glitch in the SEE ALSO section of ucontext(3)
(missing Xr to setcontext(3) and a leftover ('.Dx') from previous
revision, I guess).

Thanks,
-- 
Francis
Index: lib/libc/gen/ucontext.3
===================================================================
RCS file: /dcvs/src/lib/libc/gen/ucontext.3,v
retrieving revision 1.6
diff -u -r1.6 ucontext.3
--- lib/libc/gen/ucontext.3	16 Jan 2007 07:16:23 -0000	1.6
+++ lib/libc/gen/ucontext.3	30 Aug 2007 13:16:06 -0000
@@ -105,5 +105,5 @@
 .Sh SEE ALSO
 .Xr sigaltstack 2 ,
 .Xr getcontext 3 ,
-.Xr makecontext 3
-.Dx .
+.Xr makecontext 3 ,
+.Xr setcontext 3