[hackers] [ubase] The flag for unshare(1) is 'U' not 'u' || sin

[git]

commit 2c98e18a33a95269a17a6c4e7e5d2c86a1b7bfdc
Author: sin <s...@2f30.org>
Date:   Mon Feb 24 13:51:03 2014 +0000

    The flag for unshare(1) is 'U' not 'u'

diff --git a/unshare.c b/unshare.c
index 7251d5e..a8d4aba 100644
--- a/unshare.c
+++ b/unshare.c
@@ -10,7 +10,7 @@
 static void
 usage(void)
 {
-       eprintf("usage: %s [-muinpu] cmd [args...]
", argv0);
+       eprintf("usage: %s [-muinpU] cmd [args...]
", argv0);
 }
 
 int